diff --git a/.husky/pre-commit b/.husky/pre-commit
index 12ac302..017e2a1 100644
--- a/.husky/pre-commit
+++ b/.husky/pre-commit
@@ -1,4 +1 @@
-#!/bin/sh
-. "$(dirname "$0")/_/husky.sh"
-
 yarn lint-staged --allow-empty
diff --git a/lib/components/ViewPublicationPage/ResultForm.tsx b/lib/components/ViewPublicationPage/ResultForm.tsx
index e5f01e4..cd620c6 100644
--- a/lib/components/ViewPublicationPage/ResultForm.tsx
+++ b/lib/components/ViewPublicationPage/ResultForm.tsx
@@ -10,12 +10,10 @@ import { useVkMetricsGoals } from "@/utils/hooks/metrics/useVkMetricsGoals";
 import { useYandexMetricsGoals } from "@/utils/hooks/metrics/useYandexMetricsGoals";
 import { DESIGN_LIST } from "@/utils/designList";
 import { quizThemes } from "@utils/themes/Publication/themePublication";
-
-import YoutubeEmbedIframe from "./tools/YoutubeEmbedIframe";
-
 import { NameplateLogo } from "@icons/NameplateLogo";
 
 import type { QuizQuestionResult } from "@/model/questionTypes/result";
+import QuizVideo from "@/ui_kit/VideoIframe/VideoIframe";
 
 type ResultFormProps = {
   resultQuestion: QuizQuestionResult;
@@ -117,7 +115,7 @@ export const ResultForm = ({ resultQuestion }: ResultFormProps) => {
             }}
           >
             {!resultQuestion?.content.useImage && resultQuestion.content.video && (
-              <YoutubeEmbedIframe
+              <QuizVideo
                 videoUrl={resultQuestion.content.video}
                 containerSX={{
                   width: "100%",
diff --git a/lib/components/ViewPublicationPage/StartPageViewPublication/index.tsx b/lib/components/ViewPublicationPage/StartPageViewPublication/index.tsx
index 57c7100..8857272 100644
--- a/lib/components/ViewPublicationPage/StartPageViewPublication/index.tsx
+++ b/lib/components/ViewPublicationPage/StartPageViewPublication/index.tsx
@@ -14,8 +14,7 @@ import { DESIGN_LIST } from "@/utils/designList";
 
 import { useVkMetricsGoals } from "@/utils/hooks/metrics/useVkMetricsGoals";
 import { useYandexMetricsGoals } from "@/utils/hooks/metrics/useYandexMetricsGoals";
-
-import YoutubeEmbedIframe from "../tools/YoutubeEmbedIframe";
+import QuizVideo from "@/ui_kit/VideoIframe/VideoIframe";
 
 export const StartPageViewPublication = () => {
   const theme = useTheme();
@@ -54,7 +53,7 @@ export const StartPageViewPublication = () => {
       />
     ) : settings.cfg.startpage.background.type === "video" ? (
       settings.cfg.startpage.background.video ? (
-        <YoutubeEmbedIframe
+        <QuizVideo
           videoUrl={settings.cfg.startpage.background.video}
           containerSX={{
             width: settings.cfg.startpageType === "centered" ? "550px" : "100%",
diff --git a/lib/components/ViewPublicationPage/ViewPublicationPage.tsx b/lib/components/ViewPublicationPage/ViewPublicationPage.tsx
index 2804a48..3c16969 100644
--- a/lib/components/ViewPublicationPage/ViewPublicationPage.tsx
+++ b/lib/components/ViewPublicationPage/ViewPublicationPage.tsx
@@ -1,3 +1,7 @@
+import { ContactForm } from "@/components/ViewPublicationPage/ContactForm/ContactForm.tsx";
+import { extractImageLinksFromQuestion } from "@/utils/extractImageLinks";
+import { useVKMetrics } from "@/utils/hooks/metrics/useVKMetrics";
+import { useYandexMetrics } from "@/utils/hooks/metrics/useYandexMetrics";
 import { sendAnswer } from "@api/quizRelase";
 import { useQuizSettings } from "@contexts/QuizDataContext";
 import { ThemeProvider, Typography } from "@mui/material";
@@ -7,15 +11,13 @@ import { notReachable } from "@utils/notReachable";
 import { quizThemes } from "@utils/themes/Publication/themePublication";
 import { enqueueSnackbar } from "notistack";
 import { ReactElement, useEffect } from "react";
+import { Helmet } from "react-helmet";
 import { Question } from "./Question";
+import QuestionSelect from "./QuestionSelect";
 import { ResultForm } from "./ResultForm";
 import { StartPageViewPublication } from "./StartPageViewPublication";
 import NextButton from "./tools/NextButton";
 import PrevButton from "./tools/PrevButton";
-import QuestionSelect from "./QuestionSelect";
-import { useYandexMetrics } from "@/utils/hooks/metrics/useYandexMetrics";
-import { useVKMetrics } from "@/utils/hooks/metrics/useVKMetrics";
-import { ContactForm } from "@/components/ViewPublicationPage/ContactForm/ContactForm.tsx";
 
 export default function ViewPublicationPage() {
   const { settings, recentlyCompleted, quizId, preview, changeFaviconAndTitle } = useQuizSettings();
@@ -24,6 +26,7 @@ export default function ViewPublicationPage() {
   const {
     currentQuestion,
     currentQuestionStepNumber,
+    nextQuestion,
     isNextButtonEnabled,
     isPreviousButtonEnabled,
     moveToPrevQuestion,
@@ -56,7 +59,10 @@ export default function ViewPublicationPage() {
   if (!currentQuestion)
     return (
       <ThemeProvider theme={quizThemes[settings.cfg.theme || "StandardTheme"].theme}>
-        <Typography textAlign={"center"} mt="50px">
+        <Typography
+          textAlign={"center"}
+          mt="50px"
+        >
           Вопрос не выбран
         </Typography>
       </ThemeProvider>
@@ -80,7 +86,10 @@ export default function ViewPublicationPage() {
           currentQuestion={currentQuestion}
           currentQuestionStepNumber={currentQuestionStepNumber}
           prevButton={
-            <PrevButton isPreviousButtonEnabled={isPreviousButtonEnabled} moveToPrevQuestion={moveToPrevQuestion} />
+            <PrevButton
+              isPreviousButtonEnabled={isPreviousButtonEnabled}
+              moveToPrevQuestion={moveToPrevQuestion}
+            />
           }
           nextButton={
             <NextButton
@@ -102,20 +111,47 @@ export default function ViewPublicationPage() {
               }}
             />
           }
-          questionSelect={<QuestionSelect selectedQuestion={currentQuestion} setQuestion={setQuestion} />}
+          questionSelect={
+            <QuestionSelect
+              selectedQuestion={currentQuestion}
+              setQuestion={setQuestion}
+            />
+          }
         />
       );
       break;
     }
     case "contactform": {
-      quizStepElement = <ContactForm currentQuestion={currentQuestion} onShowResult={showResultAfterContactForm} />;
+      quizStepElement = (
+        <ContactForm
+          currentQuestion={currentQuestion}
+          onShowResult={showResultAfterContactForm}
+        />
+      );
       break;
     }
     default:
       notReachable(currentQuizStep);
   }
 
+  const preloadLinks = new Set([
+    ...extractImageLinksFromQuestion(currentQuestion),
+    ...extractImageLinksFromQuestion(nextQuestion),
+  ]);
+
   return (
-    <ThemeProvider theme={quizThemes[settings.cfg.theme || "StandardTheme"].theme}>{quizStepElement}</ThemeProvider>
+    <ThemeProvider theme={quizThemes[settings.cfg.theme || "StandardTheme"].theme}>
+      <Helmet>
+        {Array.from(preloadLinks).map((link) => (
+          <link
+            key={link}
+            rel="preload"
+            as="image"
+            href={link}
+          />
+        ))}
+      </Helmet>
+      {quizStepElement}
+    </ThemeProvider>
   );
 }
diff --git a/lib/components/ViewPublicationPage/questions/File/UploadFile.tsx b/lib/components/ViewPublicationPage/questions/File/UploadFile.tsx
index e9d0f2c..c7bb3d5 100644
--- a/lib/components/ViewPublicationPage/questions/File/UploadFile.tsx
+++ b/lib/components/ViewPublicationPage/questions/File/UploadFile.tsx
@@ -58,12 +58,10 @@ export const UploadFile = ({ currentQuestion, setModalWarningType, isSending, se
         },
         qid: quizId,
       });
-
+      console.log(data);
       await sendAnswer({
         questionId: currentQuestion.id,
-        body: `https://s3.timeweb.cloud/3c580be9-cf31f296-d055-49cf-b39e-30c7959dc17b/squizanswer/${quizId}/${
-          currentQuestion.id
-        }/${data!.data.fileIDMap[currentQuestion.id]}`,
+        body: `${data!.data.fileIDMap[currentQuestion.id]}`,
         qid: quizId,
         preview,
       });
diff --git a/lib/components/ViewPublicationPage/questions/Page/index.tsx b/lib/components/ViewPublicationPage/questions/Page/index.tsx
index 48e1b97..333ee41 100644
--- a/lib/components/ViewPublicationPage/questions/Page/index.tsx
+++ b/lib/components/ViewPublicationPage/questions/Page/index.tsx
@@ -1,8 +1,6 @@
 import { Box, Typography, useTheme } from "@mui/material";
-
-import YoutubeEmbedIframe from "@/components/ViewPublicationPage/tools/YoutubeEmbedIframe";
-
 import type { QuizQuestionPage } from "@model/questionTypes/page";
+import QuizVideo from "@/ui_kit/VideoIframe/VideoIframe";
 
 type PageProps = {
   currentQuestion: QuizQuestionPage;
@@ -35,32 +33,35 @@ export const Page = ({ currentQuestion }: PageProps) => {
         }}
       >
         {currentQuestion.content.useImage ? (
-          <Box
-            sx={{
-              borderRadius: "12px",
-              border: "1px solid #9A9AAF",
-              overflow: "hidden",
-            }}
-          >
-            <img
-              key={currentQuestion.id}
-              src={currentQuestion.content.back}
-              alt=""
-              style={{
-                display: "block",
-                width: "100%",
-                height: "100%",
-                objectFit: "contain",
+          currentQuestion.content.back && (
+            <Box
+              sx={{
+                borderRadius: "12px",
+                border: "1px solid #9A9AAF",
+                overflow: "hidden",
               }}
-            />
-          </Box>
+            >
+              <img
+                key={currentQuestion.id}
+                src={currentQuestion.content.back}
+                alt=""
+                style={{
+                  display: "block",
+                  width: "100%",
+                  height: "100%",
+                  objectFit: "contain",
+                }}
+              />
+            </Box>
+          )
         ) : (
-          <YoutubeEmbedIframe
+          <QuizVideo
             containerSX={{
               width: "100%",
               height: "calc(100% - 270px)",
               maxHeight: "80%",
               objectFit: "contain",
+              aspectRatio: "16 / 9",
             }}
             videoUrl={currentQuestion.content.video}
           />
diff --git a/lib/components/ViewPublicationPage/tools/YoutubeEmbedIframe.tsx b/lib/components/ViewPublicationPage/tools/YoutubeEmbedIframe.tsx
deleted file mode 100644
index 26d3864..0000000
--- a/lib/components/ViewPublicationPage/tools/YoutubeEmbedIframe.tsx
+++ /dev/null
@@ -1,49 +0,0 @@
-import { Box, SxProps } from "@mui/material";
-
-interface Props {
-  videoUrl: string;
-  containerSX?: SxProps;
-}
-
-export default function YoutubeEmbedIframe({ videoUrl, containerSX }: Props) {
-  const extractYoutubeVideoId =
-    /(?:youtube\.com\/(?:[^\/]+\/.+\/|(?:v|e(?:mbed)?)\/|.*[?&]v=)|youtu\.be\/)([^"&?\/\s]{11})/gi;
-  const videoId = extractYoutubeVideoId.exec(videoUrl)?.[1];
-  // if (!videoId) return null;
-
-  const embedUrl = `https://www.youtube.com/embed/${videoId}?controls=0&autoplay=1&modestbranding=0&showinfo=0&disablekb=1&mute=1&loop=1`;
-  // https://www.youtube.com/shorts/9VgqBPd6RPA
-  // https://www.youtube.com/watch?v=I2N8hTHhvGY
-  return (
-    <Box
-      sx={{
-        width: "100%",
-        height: "100%",
-        pointerEvents: "none",
-        "& iframe": {
-          width: "100%",
-          height: "100%",
-        },
-        ...containerSX,
-      }}
-    >
-      <Box
-        component="video"
-        sx={{
-          width: "100%",
-          height: "100%",
-        }}
-        autoPlay
-        muted
-        src={videoUrl}
-      />
-      {/* <iframe
-        src={embedUrl}
-        title="YouTube video player"
-        frameBorder="0"
-        allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share"
-        allowFullScreen
-      /> */}
-    </Box>
-  );
-}
diff --git a/lib/components/ViewPublicationPage/tools/checkEmptyData.ts b/lib/components/ViewPublicationPage/tools/checkEmptyData.ts
index d96066c..1131ab2 100644
--- a/lib/components/ViewPublicationPage/tools/checkEmptyData.ts
+++ b/lib/components/ViewPublicationPage/tools/checkEmptyData.ts
@@ -4,8 +4,12 @@ export const isResultQuestionEmpty = (resultQuestion: QuizQuestionResult) => {
   if (
     (resultQuestion.title.length > 0 && resultQuestion.title !== " ") ||
     (resultQuestion.description.length > 0 && resultQuestion.description !== " ") ||
-    (resultQuestion.content.back.length > 0 && resultQuestion.content.back !== " ") ||
-    (resultQuestion.content.originalBack.length > 0 && resultQuestion.content.originalBack !== " ") ||
+    (resultQuestion.content.back !== null &&
+      resultQuestion.content.back.length > 0 &&
+      resultQuestion.content.back !== " ") ||
+    (resultQuestion.content.originalBack &&
+      resultQuestion.content.originalBack.length > 0 &&
+      resultQuestion.content.originalBack !== " ") ||
     (resultQuestion.content.innerName.length > 0 && resultQuestion.content.innerName !== " ") ||
     (resultQuestion.content.text.length > 0 && resultQuestion.content.text !== " ") ||
     (resultQuestion.content.video.length > 0 && resultQuestion.content.video !== " ") ||
diff --git a/lib/index.ts b/lib/index.ts
index a1bcb08..fdac23b 100644
--- a/lib/index.ts
+++ b/lib/index.ts
@@ -1,5 +1,8 @@
 import QuizAnswerer from "./components/QuizAnswerer";
-export type { QuizSettings } from "@model/settingsData";
-export type * from "./model/widget";
+import QuizVideo from "./ui_kit/VideoIframe/VideoIframe";
 
-export { QuizAnswerer };
+export type { QuizSettings, QuizConfig } from "@model/settingsData";
+export type * from "./model/widget";
+export type * from "@model/questionTypes";
+
+export { QuizAnswerer, QuizVideo };
diff --git a/lib/model/questionTypes/date.ts b/lib/model/questionTypes/date.ts
index 291062b..8c5970d 100644
--- a/lib/model/questionTypes/date.ts
+++ b/lib/model/questionTypes/date.ts
@@ -14,8 +14,8 @@ export interface QuizQuestionDate extends QuizQuestionBase {
     time: boolean;
     hint: QuestionHint;
     rule: QuestionBranchingRule;
-    back: string;
-    originalBack: string;
+    back: string | null;
+    originalBack: string | null;
     autofill: boolean;
   };
 }
diff --git a/lib/model/questionTypes/emoji.ts b/lib/model/questionTypes/emoji.ts
index 96e0c9e..a9db0cf 100644
--- a/lib/model/questionTypes/emoji.ts
+++ b/lib/model/questionTypes/emoji.ts
@@ -17,8 +17,8 @@ export interface QuizQuestionEmoji extends QuizQuestionBase {
     variants: QuestionVariant[];
     hint: QuestionHint;
     rule: QuestionBranchingRule;
-    back: string;
-    originalBack: string;
+    back: string | null;
+    originalBack: string | null;
     autofill: boolean;
   };
 }
diff --git a/lib/model/questionTypes/file.ts b/lib/model/questionTypes/file.ts
index c1b3490..a895c76 100644
--- a/lib/model/questionTypes/file.ts
+++ b/lib/model/questionTypes/file.ts
@@ -24,7 +24,7 @@ export interface QuizQuestionFile extends QuizQuestionBase {
     type: UploadFileType;
     hint: QuestionHint;
     rule: QuestionBranchingRule;
-    back: string;
-    originalBack: string;
+    back: string | null;
+    originalBack: string | null;
   };
 }
diff --git a/lib/model/questionTypes/index.ts b/lib/model/questionTypes/index.ts
new file mode 100644
index 0000000..b99e3bd
--- /dev/null
+++ b/lib/model/questionTypes/index.ts
@@ -0,0 +1,13 @@
+export * from "./date";
+export * from "./emoji";
+export * from "./file";
+export * from "./images";
+export * from "./number";
+export * from "./page";
+export * from "./rating";
+export * from "./result";
+export * from "./select";
+export * from "./shared";
+export * from "./text";
+export * from "./variant";
+export * from "./varimg";
diff --git a/lib/model/questionTypes/number.ts b/lib/model/questionTypes/number.ts
index ab22e25..5e18616 100644
--- a/lib/model/questionTypes/number.ts
+++ b/lib/model/questionTypes/number.ts
@@ -23,8 +23,8 @@ export interface QuizQuestionNumber extends QuizQuestionBase {
     chooseRange: boolean;
     hint: QuestionHint;
     rule: QuestionBranchingRule;
-    back: string;
-    originalBack: string;
+    back: string | null;
+    originalBack: string | null;
     autofill: boolean;
     form: "star" | "trophie" | "flag" | "heart" | "like" | "bubble" | "hashtag";
   };
diff --git a/lib/model/questionTypes/page.ts b/lib/model/questionTypes/page.ts
index 37a9e3b..1fbeb3e 100644
--- a/lib/model/questionTypes/page.ts
+++ b/lib/model/questionTypes/page.ts
@@ -15,8 +15,8 @@ export interface QuizQuestionPage extends QuizQuestionBase {
     video: string;
     hint: QuestionHint;
     rule: QuestionBranchingRule;
-    back: string;
-    originalBack: string;
+    back: string | null;
+    originalBack: string | null;
     autofill: boolean;
   };
 }
diff --git a/lib/model/questionTypes/rating.ts b/lib/model/questionTypes/rating.ts
index 01b0bc8..01b740b 100644
--- a/lib/model/questionTypes/rating.ts
+++ b/lib/model/questionTypes/rating.ts
@@ -16,8 +16,8 @@ export interface QuizQuestionRating extends QuizQuestionBase {
     form: string;
     hint: QuestionHint;
     rule: QuestionBranchingRule;
-    back: string;
-    originalBack: string;
+    back: string | null;
+    originalBack: string | null;
     autofill: boolean;
     /** Позитивное описание рейтинга */
     ratingPositiveDescription: string;
diff --git a/lib/model/questionTypes/result.ts b/lib/model/questionTypes/result.ts
index 179410a..26a05ea 100644
--- a/lib/model/questionTypes/result.ts
+++ b/lib/model/questionTypes/result.ts
@@ -7,8 +7,8 @@ export interface QuizQuestionResult extends QuizQuestionBase {
   type: "result";
   content: {
     id: string;
-    back: string;
-    originalBack: string;
+    back: string | null;
+    originalBack: string | null;
     video: string;
     innerName: string;
     text: string;
@@ -17,6 +17,7 @@ export interface QuizQuestionResult extends QuizQuestionBase {
     rule: ResultQuestionBranchingRule;
     hint: QuestionHint;
     autofill: boolean;
+    usage: boolean;
     redirect: string;
   };
 }
diff --git a/lib/model/questionTypes/select.ts b/lib/model/questionTypes/select.ts
index e2e0a85..5d8bf2d 100644
--- a/lib/model/questionTypes/select.ts
+++ b/lib/model/questionTypes/select.ts
@@ -17,8 +17,8 @@ export interface QuizQuestionSelect extends QuizQuestionBase {
     variants: QuestionVariant[];
     rule: QuestionBranchingRule;
     hint: QuestionHint;
-    back: string;
-    originalBack: string;
+    back: string | null;
+    originalBack: string | null;
     autofill: boolean;
   };
 }
diff --git a/lib/model/questionTypes/shared.ts b/lib/model/questionTypes/shared.ts
index 067a120..6f77a51 100644
--- a/lib/model/questionTypes/shared.ts
+++ b/lib/model/questionTypes/shared.ts
@@ -1,4 +1,3 @@
-import { nanoid } from "nanoid";
 import type { QuizQuestionDate } from "./date";
 import type { QuizQuestionEmoji } from "./emoji";
 import type { QuizQuestionFile } from "./file";
@@ -64,6 +63,7 @@ export type QuestionType =
   | "result";
 
 export interface QuizQuestionBase {
+  backendId: number;
   /** Stable id, generated on client */
   id: string;
   quizId: number;
@@ -109,25 +109,3 @@ type FilterQuestionsWithVariants<T> = T extends {
   : never;
 
 export type QuizQuestionsWithVariants = FilterQuestionsWithVariants<AnyTypedQuizQuestion>;
-
-export const createBranchingRuleMain: (targetId: string, parentId: string) => QuestionBranchingRuleMain = (
-  targetId,
-  parentId
-) => ({
-  next: targetId,
-  or: false,
-  rules: [
-    {
-      question: parentId,
-      answers: [] as string[],
-    },
-  ],
-});
-
-export const createQuestionVariant: () => QuestionVariant = () => ({
-  id: nanoid(),
-  answer: "",
-  extendedText: "",
-  hints: "",
-  originalImageUrl: "",
-});
diff --git a/lib/model/questionTypes/text.ts b/lib/model/questionTypes/text.ts
index 5686852..0fda214 100644
--- a/lib/model/questionTypes/text.ts
+++ b/lib/model/questionTypes/text.ts
@@ -13,11 +13,11 @@ export interface QuizQuestionText extends QuizQuestionBase {
     required: boolean;
     /** Чекбокс "Автозаполнение адреса" */
     autofill: boolean;
-    answerType: "single" | "multi";
+    answerType: "single" | "multi" | "numberOnly";
     hint: QuestionHint;
     rule: QuestionBranchingRule;
-    back: string;
-    originalBack: string;
+    back: string | null;
+    originalBack: string | null;
     onlyNumbers: boolean;
   };
 }
diff --git a/lib/model/questionTypes/variant.ts b/lib/model/questionTypes/variant.ts
index de0a167..706875b 100644
--- a/lib/model/questionTypes/variant.ts
+++ b/lib/model/questionTypes/variant.ts
@@ -20,8 +20,8 @@ export interface QuizQuestionVariant extends QuizQuestionBase {
     variants: QuestionVariant[];
     hint: QuestionHint;
     rule: QuestionBranchingRule;
-    back: string;
-    originalBack: string;
+    back: string | null;
+    originalBack: string | null;
     autofill: boolean;
   };
 }
diff --git a/lib/model/questionTypes/varimg.ts b/lib/model/questionTypes/varimg.ts
index c850390..84ad2bb 100644
--- a/lib/model/questionTypes/varimg.ts
+++ b/lib/model/questionTypes/varimg.ts
@@ -15,8 +15,8 @@ export interface QuizQuestionVarImg extends QuizQuestionBase {
     variants: QuestionVariant[];
     hint: QuestionHint;
     rule: QuestionBranchingRule;
-    back: string;
-    originalBack: string;
+    back: string | null;
+    originalBack: string | null;
     autofill: boolean;
     largeCheck: boolean;
     replText: string;
diff --git a/lib/ui_kit/VideoIframe/VideoIframe.tsx b/lib/ui_kit/VideoIframe/VideoIframe.tsx
new file mode 100644
index 0000000..85c19a7
--- /dev/null
+++ b/lib/ui_kit/VideoIframe/VideoIframe.tsx
@@ -0,0 +1,43 @@
+import { Box } from "@mui/material";
+import { getVideo } from "./helper";
+import type { SxProps } from "@mui/material";
+import useSWR from "swr";
+import LoadingSkeleton from "../LoadingSkeleton";
+import { ApologyPage } from "@/components/ViewPublicationPage/ApologyPage";
+
+type VideoIframeProps = {
+  videoUrl: string;
+  containerSX?: SxProps;
+};
+
+export default function QuizVideo({ videoUrl, containerSX }: VideoIframeProps) {
+  const { data: videoData, error, isLoading } = useSWR(["video", videoUrl], (params) => getVideo(params[1]));
+
+  return (
+    <Box
+      sx={{
+        width: "100%",
+        height: "100%",
+        minHeight: videoData?.sourceName === "tiktok" ? "740px" : 0,
+        "& iframe": { width: "100%", height: "100%" },
+        ...containerSX,
+      }}
+    >
+      {isLoading ? (
+        <LoadingSkeleton />
+      ) : !videoData || error ? (
+        <ApologyPage error={error ?? new Error()} />
+      ) : videoData.sourceName === "custom" || videoData.sourceName === "yandex" ? (
+        <Box component="video" sx={{ width: "100%", height: "100%" }} autoPlay controls muted src={videoData.url} />
+      ) : (
+        <Box
+          component="iframe"
+          src={videoData.url}
+          title={videoData.sourceName}
+          allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share"
+          {...{ allowFullScreen: true, frameBorder: 0 }}
+        />
+      )}
+    </Box>
+  );
+}
diff --git a/lib/ui_kit/VideoIframe/helper.ts b/lib/ui_kit/VideoIframe/helper.ts
new file mode 100644
index 0000000..8e0d97f
--- /dev/null
+++ b/lib/ui_kit/VideoIframe/helper.ts
@@ -0,0 +1,165 @@
+import axios from "axios";
+
+type SourceType = "youtube" | "short" | "vk" | "google" | "yandex" | "mail" | "tiktok" | "custom";
+
+export type VideoUrlResult = {
+  sourceName: SourceType;
+  url: string;
+};
+
+type TiktokResponse = {
+  version: string;
+  type: string;
+  title: string;
+  author_url: string;
+  author_name: string;
+  width: string;
+  height: string;
+  html: string;
+  thumbnail_width: number;
+  thumbnail_height: number;
+  thumbnail_url: string;
+  provider_url: string;
+  provider_name: string;
+  author_unique_id: string;
+  embed_product_id: string;
+  embed_type: string;
+};
+
+type YandexResponse = {
+  antivirus_status: string;
+  views_count: number;
+  resource_id: string;
+  file: string;
+  owner: {
+    login: string;
+    display_name: string;
+    uid: string;
+  };
+  size: number;
+  exif: unknown;
+  media_type: string;
+  preview: string;
+  type: string;
+  mime_type: string;
+  revision: number;
+  public_url: string;
+  path: string;
+  md5: string;
+  public_key: string;
+  sha256: string;
+  name: string;
+  created: string;
+  sizes: {
+    url: string;
+    name: string;
+  }[];
+  modified: string;
+  comment_ids: {
+    private_resource: string;
+    public_resource: string;
+  };
+};
+
+const FILTER_SITES_REGEX: Record<Exclude<SourceType, "short" | "custom">, RegExp> = {
+  youtube: /^(https?:\/\/)?(www\.)?((m\.youtube|youtube)\.com|youtu\.be)\/.+$/,
+  vk: /^(https?:\/\/)?(m.)?vk\..+$/,
+  tiktok: /^(https?:\/\/)?((www|vt).)?tiktok\..+$/,
+  google: /^(https?:\/\/)?(www.)?drive\.google\..+$/,
+  yandex: /^(https?:\/\/)?disk\.yandex\..+$/,
+  mail: /^(https?:\/\/)?cloud\.mail\..+$/,
+};
+
+const EXTRACT_VIDEO_ID_REGEX: Record<Exclude<SourceType, "custom">, RegExp> = {
+  youtube: /(?<=v=|v\/|d\/|be\/|embed\/)[\w-]+/,
+  short: /(?<=v=|v\/|d\/|be\/|embed\/)[\w-]+/,
+  vk: /(-?(\d+)_(\d+))/,
+  google: /(?<=(file\/d\/))[\w-]+/,
+  yandex: /(?<=i\/)[\w-]+/,
+  mail: /$/,
+  tiktok: /(?<=video\/|\.com\/)[\w-]+/,
+};
+
+export const getVideo = async (videoUrl: string): Promise<VideoUrlResult> => {
+  if (videoUrl.match(FILTER_SITES_REGEX.youtube)?.[0]) {
+    if (videoUrl.includes("youtube.com/shorts")) {
+      const videoId = videoUrl.match(EXTRACT_VIDEO_ID_REGEX.short)?.[0];
+
+      return {
+        sourceName: "short",
+        url: `https://www.youtube.com/embed/${videoId}?controls=0&autoplay=1&modestbranding=0&showinfo=0&disablekb=1&mute=1&loop=1`,
+      };
+    }
+
+    const videoId = videoUrl.match(EXTRACT_VIDEO_ID_REGEX.youtube)?.[0];
+    return {
+      sourceName: "youtube",
+      url: `https://www.youtube.com/embed/${videoId}?controls=0&autoplay=1&modestbranding=0&showinfo=0&disablekb=1&mute=1&loop=1`,
+    };
+  }
+
+  if (videoUrl.match(FILTER_SITES_REGEX.vk)) {
+    const videoId = videoUrl.match(EXTRACT_VIDEO_ID_REGEX.vk)?.[0];
+
+    return {
+      sourceName: "vk",
+      url: `https://vk.com/video_ext.php?oid=${videoId?.split("_")[0]}&id=${videoId?.split("_")[1]}`,
+    };
+  }
+
+  if (videoUrl.match(FILTER_SITES_REGEX.tiktok)) {
+    const videoId = videoUrl.match(EXTRACT_VIDEO_ID_REGEX.tiktok)?.[0] ?? "";
+
+    if (/[a-zA-Z]/.test(videoId)) {
+      try {
+        const { data } = await axios.get<TiktokResponse>("https://www.tiktok.com/oembed", {
+          params: { url: videoUrl },
+        });
+
+        return {
+          sourceName: "tiktok",
+          url: `https://www.tiktok.com/embed/v2/${data.embed_product_id}?embedFrom=embed_page_preview`,
+        };
+      } catch {}
+
+      return {
+        sourceName: "tiktok",
+        url: `https://www.tiktok.com/embed/v2/${videoId}?embedFrom=embed_page_preview`,
+      };
+    }
+
+    return {
+      sourceName: "tiktok",
+      url: `https://www.tiktok.com/embed/v2/${videoId}?embedFrom=embed_page_preview`,
+    };
+  }
+
+  if (videoUrl.match(FILTER_SITES_REGEX.google)) {
+    const videoId = videoUrl.match(EXTRACT_VIDEO_ID_REGEX.google)?.[0];
+
+    return {
+      sourceName: "google",
+      url: `https://drive.google.com/file/d/${videoId}/preview`,
+    };
+  }
+
+  if (videoUrl.match(FILTER_SITES_REGEX.yandex)) {
+    const videoId = videoUrl.match(EXTRACT_VIDEO_ID_REGEX.yandex);
+
+    try {
+      const { data } = await axios.get<YandexResponse>("https://cloud-api.yandex.net/v1/disk/public/resources", {
+        params: { public_key: `https://disk.yandex.ru/i/${videoId}` },
+      });
+
+      return { sourceName: "yandex", url: data.file };
+    } catch {}
+
+    return { sourceName: "yandex", url: "" };
+  }
+
+  if (videoUrl.match(FILTER_SITES_REGEX.mail)) {
+    return { sourceName: "mail", url: videoUrl };
+  }
+
+  return { sourceName: "custom", url: videoUrl };
+};
diff --git a/lib/utils/extractImageLinks.ts b/lib/utils/extractImageLinks.ts
new file mode 100644
index 0000000..4799487
--- /dev/null
+++ b/lib/utils/extractImageLinks.ts
@@ -0,0 +1,29 @@
+import { AnyTypedQuizQuestion } from "@/model/questionTypes";
+
+export function extractImageLinksFromQuestion(question: AnyTypedQuizQuestion | null | undefined): string[] {
+  if (!question) return [];
+
+  const links: string[] = [];
+
+  if (question.type === "images") {
+    question.content.variants.forEach((variant) => {
+      if (variant.extendedText.startsWith("https://")) links.push(variant.extendedText);
+    });
+  }
+
+  if (question.type === "varimg") {
+    question.content.variants.forEach((variant) => {
+      if (variant.extendedText.startsWith("https://")) links.push(variant.extendedText);
+    });
+  }
+
+  if (question.type === "page") {
+    if (question.content.back?.startsWith("https://")) links.push(question.content.back);
+  }
+
+  if (question.type === "result") {
+    if (question.content.back?.startsWith("https://")) links.push(question.content.back);
+  }
+
+  return links;
+}
diff --git a/lib/utils/hooks/useQuestionFlowControl.ts b/lib/utils/hooks/useQuestionFlowControl.ts
index 4c94381..6a6393a 100644
--- a/lib/utils/hooks/useQuestionFlowControl.ts
+++ b/lib/utils/hooks/useQuestionFlowControl.ts
@@ -197,6 +197,7 @@ export function useQuestionFlowControl() {
   return {
     currentQuestion,
     currentQuestionStepNumber: linearQuestionIndex === null ? null : linearQuestionIndex + 1,
+    nextQuestion,
     isNextButtonEnabled,
     isPreviousButtonEnabled,
     moveToPrevQuestion,
diff --git a/package.json b/package.json
index d01d328..49315f4 100755
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@frontend/squzanswerer",
-  "version": "1.0.44",
+  "version": "1.0.51",
   "type": "module",
   "main": "./dist-package/index.js",
   "module": "./dist-package/index.js",
@@ -26,7 +26,7 @@
     "preview": "vite preview",
     "cypress:open": "cypress open",
     "prepublishOnly": "npm run build:package",
-    "prepare": "husky install"
+    "prepare": "husky"
   },
   "devDependencies": {
     "@emoji-mart/data": "^1.1.2",
@@ -39,6 +39,7 @@
     "@types/node": "^16.7.13",
     "@types/react": "^18.2.43",
     "@types/react-dom": "^18.2.17",
+    "@types/react-helmet": "^6.1.11",
     "@typescript-eslint/eslint-plugin": "^6.14.0",
     "@typescript-eslint/parser": "^6.14.0",
     "@vitejs/plugin-react": "^4.2.1",
@@ -95,6 +96,7 @@
     "hex-rgb": "^5.0.0",
     "mobile-detect": "^1.4.5",
     "mui-tel-input": "^5.1.2",
+    "react-helmet": "^6.1.0",
     "react-imask": "^7.6.0",
     "react-phone-number-input": "^3.4.1"
   },
@@ -108,7 +110,8 @@
     "endOfLine": "auto",
     "bracketSpacing": true,
     "arrowParens": "always",
-    "jsxSingleQuote": false
+    "jsxSingleQuote": false,
+    "singleAttributePerLine": true
   },
   "lint-staged": {
     "*": "prettier --write --ignore-unknown"
diff --git a/src/widgets/banner/QuizBanner.tsx b/src/widgets/banner/QuizBanner.tsx
index 0f17ef7..2345f05 100644
--- a/src/widgets/banner/QuizBanner.tsx
+++ b/src/widgets/banner/QuizBanner.tsx
@@ -66,10 +66,10 @@ export default function QuizBanner({
         }
       };
 
-      document.addEventListener("mouseleave", handleMouseLeave);
+      document.documentElement.addEventListener("mouseleave", handleMouseLeave);
 
       return () => {
-        document.removeEventListener("mouseleave", handleMouseLeave);
+        document.documentElement.removeEventListener("mouseleave", handleMouseLeave);
       };
     },
     [openOnLeaveAttempt]
@@ -85,7 +85,7 @@ export default function QuizBanner({
   if (!quizData) return null;
 
   const isQuizCompleted = quizData.settings.cfg.antifraud ? quizData.recentlyCompleted : false;
-  const showButtonFlash = isQuizCompleted && isFlashEnabled;
+  const showButtonFlash = !isQuizCompleted && isFlashEnabled;
 
   let hoverBackgroundColor = buttonBackgroundColor;
   if (buttonBackgroundColor) {
diff --git a/src/widgets/button/OpenQuizButton.tsx b/src/widgets/button/OpenQuizButton.tsx
index cbd6690..920e928 100644
--- a/src/widgets/button/OpenQuizButton.tsx
+++ b/src/widgets/button/OpenQuizButton.tsx
@@ -74,7 +74,7 @@ export default function OpenQuizButton({
   if (!quizData) return null;
 
   const isQuizCompleted = quizData.settings.cfg.antifraud ? quizData.recentlyCompleted : false;
-  const showButtonFlash = isQuizCompleted && isFlashEnabled;
+  const showButtonFlash = !isQuizCompleted && isFlashEnabled;
 
   let hoverBackgroundColor = buttonBackgroundColor;
   if (buttonBackgroundColor) {
diff --git a/src/widgets/side/QuizSideButton.tsx b/src/widgets/side/QuizSideButton.tsx
index 47c142e..8f195de 100644
--- a/src/widgets/side/QuizSideButton.tsx
+++ b/src/widgets/side/QuizSideButton.tsx
@@ -56,7 +56,7 @@ export default function QuizSideButton({
   if (!quizData) return null;
 
   const isQuizCompleted = quizData.settings.cfg.antifraud ? quizData.recentlyCompleted : false;
-  const showButtonFlash = isQuizCompleted && isFlashEnabled;
+  const showButtonFlash = !isQuizCompleted && isFlashEnabled;
 
   return createPortal(
     <ThemeProvider theme={lightTheme}>
diff --git a/yarn.lock b/yarn.lock
index 5451ba1..884c4d3 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -985,6 +985,13 @@
   dependencies:
     "@types/react" "*"
 
+"@types/react-helmet@^6.1.11":
+  version "6.1.11"
+  resolved "https://registry.yarnpkg.com/@types/react-helmet/-/react-helmet-6.1.11.tgz#8cafcafff38f75361f451563ba7b406b0c5d3907"
+  integrity sha512-0QcdGLddTERotCXo3VFlUSWO3ztraw8nZ6e3zJSgG7apwV5xt+pJUS8ewPBqT4NYB1optGLprNQzFleIY84u/g==
+  dependencies:
+    "@types/react" "*"
+
 "@types/react-transition-group@^4.4.10", "@types/react-transition-group@^4.4.8":
   version "4.4.10"
   resolved "https://registry.yarnpkg.com/@types/react-transition-group/-/react-transition-group-4.4.10.tgz#6ee71127bdab1f18f11ad8fb3322c6da27c327ac"
@@ -3213,7 +3220,7 @@ process@^0.11.10:
   resolved "https://registry.yarnpkg.com/process/-/process-0.11.10.tgz#7332300e840161bda3e69a1d1d91a7d4bc16f182"
   integrity sha512-cdGef/drWFoydD1JsMzuFf8100nZl+GT+yacc2bEced5f9Rjk4z+WtFUTBu9PhOi9j/jfmBPu0mMEY4wIdAF8A==
 
-prop-types@^15.6.2, prop-types@^15.8.1:
+prop-types@^15.6.2, prop-types@^15.7.2, prop-types@^15.8.1:
   version "15.8.1"
   resolved "https://registry.yarnpkg.com/prop-types/-/prop-types-15.8.1.tgz#67d87bf1a694f48435cf332c24af10214a3140b5"
   integrity sha512-oj87CgZICdulUohogVAR7AjlC0327U4el4L6eAvOqCeudMDVU0NThNaV+b9Df4dXgSP1gXMTnPdhfe/2qDH5cg==
@@ -3282,6 +3289,21 @@ react-error-boundary@^4.0.12:
   dependencies:
     "@babel/runtime" "^7.12.5"
 
+react-fast-compare@^3.1.1:
+  version "3.2.2"
+  resolved "https://registry.yarnpkg.com/react-fast-compare/-/react-fast-compare-3.2.2.tgz#929a97a532304ce9fee4bcae44234f1ce2c21d49"
+  integrity sha512-nsO+KSNgo1SbJqJEYRE9ERzo7YtYbou/OqjSQKxV7jcKox7+usiUVZOAC+XnDOABXggQTno0Y1CpVnuWEc1boQ==
+
+react-helmet@^6.1.0:
+  version "6.1.0"
+  resolved "https://registry.yarnpkg.com/react-helmet/-/react-helmet-6.1.0.tgz#a750d5165cb13cf213e44747502652e794468726"
+  integrity sha512-4uMzEY9nlDlgxr61NL3XbKRy1hEkXmKNXhjbAIOVw5vcFrsdYbH2FEwcNyWvWinl103nXgzYNlns9ca+8kFiWw==
+  dependencies:
+    object-assign "^4.1.1"
+    prop-types "^15.7.2"
+    react-fast-compare "^3.1.1"
+    react-side-effect "^2.1.0"
+
 react-imask@^7.6.0:
   version "7.6.0"
   resolved "https://registry.yarnpkg.com/react-imask/-/react-imask-7.6.0.tgz#5948fc39e1d7d036292d4fade43df4636d43e7b7"
@@ -3331,6 +3353,11 @@ react-router@6.23.1:
   dependencies:
     "@remix-run/router" "1.16.1"
 
+react-side-effect@^2.1.0:
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/react-side-effect/-/react-side-effect-2.1.2.tgz#dc6345b9e8f9906dc2eeb68700b615e0b4fe752a"
+  integrity sha512-PVjOcvVOyIILrYoyGEpDN3vmYNLdy1CajSFNt4TDsVQC5KpTijDvWVoR+/7Rz2xT978D8/ZtFceXxzsPwZEDvw==
+
 react-transition-group@^4.4.5:
   version "4.4.5"
   resolved "https://registry.yarnpkg.com/react-transition-group/-/react-transition-group-4.4.5.tgz#e53d4e3f3344da8521489fbef8f2581d42becdd1"