chore: v5.5.0 release

README.md

@@ -542,6 +542,8 @@ Retrieves contents for a given channel.
 - `<channel>#getVideos()`
 - `<channel>#getShorts()`
 - `<channel>#getLiveStreams()`
+- `<channel>#getReleases()`
+- `<channel>#getPodcasts()`
 - `<channel>#getPlaylists()`
 - `<channel>#getHome()`
 - `<channel>#getCommunity()`

deno/package.json

@@ -1,6 +1,6 @@
 {
   "name": "youtubei.js",
-  "version": "5.2.1",
+  "version": "5.5.0",
   "description": "A wrapper around YouTube's private API. Supports YouTube, YouTube Music, YouTube Kids and YouTube Studio (WIP).",
   "type": "module",
   "types": "./dist/src/platform/lib.d.ts",
@@ -84,7 +84,7 @@
   },
   "license": "MIT",
   "dependencies": {
-    "jintr": "^1.0.0",
+    "jintr": "^1.1.0",
     "linkedom": "^0.14.12",
     "tslib": "^2.5.0",
     "undici": "^5.19.1"

deno/src/core/endpoints/PlayerEndpoint.ts

@@ -8,6 +8,11 @@ export const PATH = '/player';
  * @returns The payload.
  */
 export function build(opts: PlayerEndpointOptions): IPlayerRequest {
+  const is_android =
+    opts.client === 'ANDROID' ||
+    opts.client === 'YTMUSIC_ANDROID' ||
+    opts.client === 'YTSTUDIO_ANDROID';
+
   return {
     playbackContext: {
       contentPlaybackContext: {
@@ -37,8 +42,8 @@ export function build(opts: PlayerEndpointOptions): IPlayerRequest {
     ...{
       client: opts.client,
       playlistId: opts.playlist_id,
-      // Workaround streaming URLs returning 403 when using Android clients and throttling in web clients.
-      params: '2AMBCgIQBg'
+      // Workaround streaming URLs returning 403 or getting throttled when using Android based clients.
+      params: is_android ? '2AMBCgIQBg' : opts.params
     }
   };
 }

deno/src/parser/classes/EngagementPanelSectionList.ts

@@ -2,6 +2,7 @@ import { YTNode } from '../helpers.ts';
 import Parser, { type RawNode } from '../index.ts';
 import ContinuationItem from './ContinuationItem.ts';
 import EngagementPanelTitleHeader from './EngagementPanelTitleHeader.ts';
+import MacroMarkersList from './MacroMarkersList.ts';
 import SectionList from './SectionList.ts';
 import StructuredDescriptionContent from './StructuredDescriptionContent.ts';
 
@@ -9,7 +10,7 @@ export default class EngagementPanelSectionList extends YTNode {
   static type = 'EngagementPanelSectionList';
 
   header: EngagementPanelTitleHeader | null;
-  content: SectionList | ContinuationItem | StructuredDescriptionContent | null;
+  content: SectionList | ContinuationItem | StructuredDescriptionContent | MacroMarkersList | null;
   target_id?: string;
   panel_identifier?: string;
   visibility?: string;
@@ -17,7 +18,7 @@ export default class EngagementPanelSectionList extends YTNode {
   constructor(data: RawNode) {
     super();
     this.header = Parser.parseItem(data.header, EngagementPanelTitleHeader);
-    this.content = Parser.parseItem(data.content, [ SectionList, ContinuationItem, StructuredDescriptionContent ]);
+    this.content = Parser.parseItem(data.content, [ SectionList, ContinuationItem, StructuredDescriptionContent, MacroMarkersList ]);
     this.panel_identifier = data.panelIdentifier;
     this.target_id = data.targetId;
     this.visibility = data.visibility;

deno/src/parser/classes/HashtagTile.ts

@@ -0,0 +1,28 @@
+import { YTNode } from '../helpers.ts';
+import type { RawNode } from '../index.ts';
+import { Thumbnail } from '../misc.ts';
+import NavigationEndpoint from './NavigationEndpoint.ts';
+import Text from './misc/Text.ts';
+
+export default class HashtagTile extends YTNode {
+  static type = 'HashtagTile';
+
+  hashtag: Text;
+  hashtag_info_text: Text;
+  hashtag_thumbnail: Thumbnail[];
+  endpoint: NavigationEndpoint;
+  hashtag_background_color: number;
+  hashtag_video_count: Text;
+  hashtag_channel_count: Text;
+
+  constructor(data: RawNode) {
+    super();
+    this.hashtag = new Text(data.hashtag);
+    this.hashtag_info_text = new Text(data.hashtagInfoText);
+    this.hashtag_thumbnail = Thumbnail.fromResponse(data.hashtagThumbnail);
+    this.endpoint = new NavigationEndpoint(data.onTapCommand);
+    this.hashtag_background_color = data.hashtagBackgroundColor;
+    this.hashtag_video_count = new Text(data.hashtagVideoCount);
+    this.hashtag_channel_count = new Text(data.hashtagChannelCount);
+  }
+}

deno/src/parser/classes/MacroMarkersInfoItem.ts

@@ -0,0 +1,17 @@
+import { YTNode } from '../helpers.ts';
+import { Parser, type RawNode } from '../index.ts';
+import Menu from './menus/Menu.ts';
+import Text from './misc/Text.ts';
+
+export default class MacroMarkersInfoItem extends YTNode {
+  static type = 'MacroMarkersInfoItem';
+
+  info_text: Text;
+  menu: Menu | null;
+
+  constructor(data: RawNode) {
+    super();
+    this.info_text = new Text(data.infoText);
+    this.menu = Parser.parseItem(data.menu, Menu);
+  }
+}

deno/src/parser/classes/MacroMarkersList.ts

@@ -0,0 +1,18 @@
+import { YTNode, type ObservedArray } from '../helpers.ts';
+import { Parser, type RawNode } from '../index.ts';
+import { Text } from '../misc.ts';
+import MacroMarkersInfoItem from './MacroMarkersInfoItem.ts';
+import MacroMarkersListItem from './MacroMarkersListItem.ts';
+
+export default class MacroMarkersList extends YTNode {
+  static type = 'MacroMarkersList';
+
+  contents: ObservedArray<MacroMarkersInfoItem | MacroMarkersListItem>;
+  sync_button_label: Text;
+
+  constructor(data: RawNode) {
+    super();
+    this.contents = Parser.parseArray(data.contents, [ MacroMarkersInfoItem, MacroMarkersListItem ]);
+    this.sync_button_label = new Text(data.syncButtonLabel);
+  }
+}

deno/src/parser/classes/PlayerCaptionsTracklist.ts

@@ -17,10 +17,10 @@ export default class PlayerCaptionsTracklist extends YTNode {
   audio_tracks?: {
     audio_track_id: string;
     captions_initial_state: string;
-    default_caption_track_index: number;
+    default_caption_track_index?: number;
     has_default_track: boolean;
     visibility: string;
-    caption_track_indices: number;
+    caption_track_indices: number[];
   }[];
 
   default_audio_track_index?: number;

deno/src/parser/classes/Playlist.ts

@@ -1,6 +1,7 @@
 import { YTNode, type ObservedArray } from '../helpers.ts';
 import Parser, { type RawNode } from '../index.ts';
 import NavigationEndpoint from './NavigationEndpoint.ts';
+import PlaylistCustomThumbnail from './PlaylistCustomThumbnail.ts';
 import PlaylistVideoThumbnail from './PlaylistVideoThumbnail.ts';
 import Author from './misc/Author.ts';
 import Text from './misc/Text.ts';
@@ -13,7 +14,7 @@ export default class Playlist extends YTNode {
   title: Text;
   author: Text | Author;
   thumbnails: Thumbnail[];
-  thumbnail_renderer?: PlaylistVideoThumbnail;
+  thumbnail_renderer?: PlaylistVideoThumbnail | PlaylistCustomThumbnail;
   video_count: Text;
   video_count_short: Text;
   first_videos: ObservedArray<YTNode>;
@@ -44,7 +45,7 @@ export default class Playlist extends YTNode {
     this.thumbnail_overlays = Parser.parseArray(data.thumbnailOverlays);
 
     if (Reflect.has(data, 'thumbnailRenderer')) {
-      this.thumbnail_renderer = Parser.parseItem(data.thumbnailRenderer, PlaylistVideoThumbnail) || undefined;
+      this.thumbnail_renderer = Parser.parseItem(data.thumbnailRenderer, [ PlaylistVideoThumbnail, PlaylistCustomThumbnail ]) || undefined;
     }
 
     if (Reflect.has(data, 'viewPlaylistText')) {

deno/src/parser/classes/Quiz.ts

@@ -0,0 +1,25 @@
+import { YTNode } from '../helpers.ts';
+import type { RawNode } from '../index.ts';
+import Text from './misc/Text.ts';
+
+export default class Quiz extends YTNode {
+  static type = 'Quiz';
+
+  choices: {
+    text: Text;
+    is_correct: boolean;
+  }[];
+
+  total_votes: Text;
+
+  constructor(data: RawNode) {
+    super();
+
+    this.choices = data.choices.map((choice: RawNode) => ({
+      text: new Text(choice.text),
+      is_correct: choice.isCorrect
+    }));
+
+    this.total_votes = new Text(data.totalVotes);
+  }
+}

deno/src/parser/classes/StructuredDescriptionContent.ts

@@ -1,6 +1,7 @@
 import { YTNode, type ObservedArray } from '../helpers.ts';
 import Parser, { type RawNode } from '../index.ts';
 import ExpandableVideoDescriptionBody from './ExpandableVideoDescriptionBody.ts';
+import HorizontalCardList from './HorizontalCardList.ts';
 import VideoDescriptionHeader from './VideoDescriptionHeader.ts';
 import VideoDescriptionInfocardsSection from './VideoDescriptionInfocardsSection.ts';
 import VideoDescriptionMusicSection from './VideoDescriptionMusicSection.ts';
@@ -8,10 +9,10 @@ import VideoDescriptionMusicSection from './VideoDescriptionMusicSection.ts';
 export default class StructuredDescriptionContent extends YTNode {
   static type = 'StructuredDescriptionContent';
 
-  items: ObservedArray<VideoDescriptionHeader | ExpandableVideoDescriptionBody | VideoDescriptionMusicSection | VideoDescriptionInfocardsSection>;
+  items: ObservedArray<VideoDescriptionHeader | ExpandableVideoDescriptionBody | VideoDescriptionMusicSection | VideoDescriptionInfocardsSection | HorizontalCardList>;
 
   constructor(data: RawNode) {
     super();
-    this.items = Parser.parseArray(data.items, [ VideoDescriptionHeader, ExpandableVideoDescriptionBody, VideoDescriptionMusicSection, VideoDescriptionInfocardsSection ]);
+    this.items = Parser.parseArray(data.items, [ VideoDescriptionHeader, ExpandableVideoDescriptionBody, VideoDescriptionMusicSection, VideoDescriptionInfocardsSection, HorizontalCardList ]);
   }
 }

deno/src/parser/classes/comments/CommentsEntryPointHeader.ts

@@ -1,9 +1,10 @@
 import Text from '../misc/Text.ts';
 import Thumbnail from '../misc/Thumbnail.ts';
+import CommentsSimplebox from './CommentsSimplebox.ts';
+import CommentsEntryPointTeaser from './CommentsEntryPointTeaser.ts';
 import { YTNode } from '../../helpers.ts';
 import type { RawNode } from '../../index.ts';
 import { Parser } from '../../index.ts';
-import CommentsEntryPointTeaser from './CommentsEntryPointTeaser.ts';
 
 export default class CommentsEntryPointHeader extends YTNode {
   static type = 'CommentsEntryPointHeader';
@@ -12,7 +13,7 @@ export default class CommentsEntryPointHeader extends YTNode {
   comment_count?: Text;
   teaser_avatar?: Thumbnail[];
   teaser_content?: Text;
-  content_renderer?: CommentsEntryPointTeaser | null;
+  content_renderer?: CommentsEntryPointTeaser | CommentsSimplebox | null;
   simplebox_placeholder?: Text;
 
   constructor(data: RawNode) {
@@ -35,7 +36,7 @@ export default class CommentsEntryPointHeader extends YTNode {
     }
 
     if (Reflect.has(data, 'contentRenderer')) {
-      this.content_renderer = Parser.parseItem(data.contentRenderer, CommentsEntryPointTeaser);
+      this.content_renderer = Parser.parseItem(data.contentRenderer, [ CommentsEntryPointTeaser, CommentsSimplebox ]);
     }
 
     if (Reflect.has(data, 'simpleboxPlaceholder')) {

deno/src/parser/classes/comments/CommentsSimplebox.ts

@@ -0,0 +1,17 @@
+import { YTNode } from '../../helpers.ts';
+import Text from '../misc/Text.ts';
+import Thumbnail from '../misc/Thumbnail.ts';
+import type { RawNode } from '../../index.ts';
+
+export default class CommentsSimplebox extends YTNode {
+  static type = 'CommentsSimplebox';
+
+  simplebox_avatar: Thumbnail[];
+  simplebox_placeholder: Text;
+
+  constructor(data: RawNode) {
+    super();
+    this.simplebox_avatar = Thumbnail.fromResponse(data.simpleboxAvatar);
+    this.simplebox_placeholder = new Text(data.simpleboxPlaceholder);
+  }
+}

deno/src/parser/classes/misc/Format.ts

@@ -46,6 +46,12 @@ export default class Format {
   is_descriptive?: boolean;
   is_original?: boolean;
 
+  color_info?: {
+    primaries?: string;
+    transfer_characteristics?: string;
+    matrix_coefficients?: string;
+  };
+
   constructor(data: RawNode) {
     this.itag = data.itag;
     this.mime_type = data.mimeType;
@@ -81,14 +87,24 @@ export default class Format {
     this.has_audio = !!data.audioBitrate || !!data.audioQuality;
     this.has_video = !!data.qualityLabel;
 
+    this.color_info = data.colorInfo ? {
+      primaries: data.colorInfo.primaries?.replace('COLOR_PRIMARIES_', ''),
+      transfer_characteristics: data.colorInfo.transferCharacteristics?.replace('COLOR_TRANSFER_CHARACTERISTICS_', ''),
+      matrix_coefficients: data.colorInfo.matrixCoefficients?.replace('COLOR_MATRIX_COEFFICIENTS_', '')
+    } : undefined;
+
     if (this.has_audio) {
       const args = new URLSearchParams(this.cipher || this.signature_cipher);
       const url_components = new URLSearchParams(args.get('url') || this.url);
 
-      this.language = url_components.get('xtags')?.split(':').find((x: string) => x.startsWith('lang='))?.split('=').at(1) || null;
-      this.is_dubbed = url_components.get('xtags')?.split(':').find((x: string) => x.startsWith('acont='))?.split('=').at(1) === 'dubbed';
-      this.is_descriptive = url_components.get('xtags')?.split(':').find((x: string) => x.startsWith('acont='))?.split('=').at(1) === 'descriptive';
-      this.is_original = url_components.get('xtags')?.split(':').find((x: string) => x.startsWith('acont='))?.split('=').at(1) === 'original' || !this.is_dubbed;
+      const xtags = url_components.get('xtags')?.split(':');
+
+      const audio_content = xtags?.find((x) => x.startsWith('acont='))?.split('=')[1];
+
+      this.language = xtags?.find((x: string) => x.startsWith('lang='))?.split('=')[1] || null;
+      this.is_dubbed = audio_content === 'dubbed';
+      this.is_descriptive = audio_content === 'descriptive';
+      this.is_original = audio_content === 'original' || !this.is_dubbed || !this.is_descriptive;
 
       if (Reflect.has(data, 'audioTrack')) {
         this.audio_track = {

deno/src/parser/nodes.ts

@@ -58,6 +58,7 @@ export { default as CommentsEntryPointHeader } from './classes/comments/Comments
 export { default as CommentsEntryPointTeaser } from './classes/comments/CommentsEntryPointTeaser.ts';
 export { default as CommentsHeader } from './classes/comments/CommentsHeader.ts';
 export { default as CommentSimplebox } from './classes/comments/CommentSimplebox.ts';
+export { default as CommentsSimplebox } from './classes/comments/CommentsSimplebox.ts';
 export { default as CommentThread } from './classes/comments/CommentThread.ts';
 export { default as CreatorHeart } from './classes/comments/CreatorHeart.ts';
 export { default as EmojiPicker } from './classes/comments/EmojiPicker.ts';
@@ -115,6 +116,7 @@ export { default as GuideEntry } from './classes/GuideEntry.ts';
 export { default as GuideSection } from './classes/GuideSection.ts';
 export { default as GuideSubscriptionsSection } from './classes/GuideSubscriptionsSection.ts';
 export { default as HashtagHeader } from './classes/HashtagHeader.ts';
+export { default as HashtagTile } from './classes/HashtagTile.ts';
 export { default as Heatmap } from './classes/Heatmap.ts';
 export { default as HeatMarker } from './classes/HeatMarker.ts';
 export { default as HeroPlaylistThumbnail } from './classes/HeroPlaylistThumbnail.ts';
@@ -178,6 +180,8 @@ export { default as LiveChatItemList } from './classes/LiveChatItemList.ts';
 export { default as LiveChatMessageInput } from './classes/LiveChatMessageInput.ts';
 export { default as LiveChatParticipant } from './classes/LiveChatParticipant.ts';
 export { default as LiveChatParticipantsList } from './classes/LiveChatParticipantsList.ts';
+export { default as MacroMarkersInfoItem } from './classes/MacroMarkersInfoItem.ts';
+export { default as MacroMarkersList } from './classes/MacroMarkersList.ts';
 export { default as MacroMarkersListItem } from './classes/MacroMarkersListItem.ts';
 export { default as Menu } from './classes/menus/Menu.ts';
 export { default as MenuNavigationItem } from './classes/menus/MenuNavigationItem.ts';
@@ -265,6 +269,7 @@ export { default as ProfileColumn } from './classes/ProfileColumn.ts';
 export { default as ProfileColumnStats } from './classes/ProfileColumnStats.ts';
 export { default as ProfileColumnStatsEntry } from './classes/ProfileColumnStatsEntry.ts';
 export { default as ProfileColumnUserInfo } from './classes/ProfileColumnUserInfo.ts';
+export { default as Quiz } from './classes/Quiz.ts';
 export { default as RecognitionShelf } from './classes/RecognitionShelf.ts';
 export { default as ReelItem } from './classes/ReelItem.ts';
 export { default as ReelShelf } from './classes/ReelShelf.ts';

deno/src/parser/parser.ts

@@ -413,6 +413,8 @@ export default class Parser {
     return observe(actions.map((action: any) => {
       if (action.navigateAction)
         return new NavigateAction(action.navigateAction);
+      if (action.showMiniplayerCommand)
+        return new ShowMiniplayerCommand(action.showMiniplayerCommand);
       if (action.reloadContinuationItemsCommand)
         return new ReloadContinuationItemsCommand(action.reloadContinuationItemsCommand);
       if (action.appendContinuationItemsAction)
@@ -574,6 +576,19 @@ export class NavigateAction extends YTNode {
   }
 }
 
+export class ShowMiniplayerCommand extends YTNode {
+  static readonly type = 'showMiniplayerCommand';
+
+  miniplayer_command: NavigationEndpoint;
+  show_premium_branding: boolean;
+
+  constructor(data: RawNode) {
+    super();
+    this.miniplayer_command = new NavigationEndpoint(data.miniplayerCommand);
+    this.show_premium_branding = data.showPremiumBranding;
+  }
+}
+
 export class AppendContinuationItemsAction extends YTNode {
   static readonly type = 'appendContinuationItemsAction';
 

deno/src/parser/youtube/Channel.ts

@@ -163,6 +163,16 @@ export default class Channel extends TabbedFeed<IBrowseResponse> {
     return new Channel(this.actions, tab.page, true);
   }
 
+  async getReleases(): Promise<Channel> {
+    const tab = await this.getTabByURL('releases');
+    return new Channel(this.actions, tab.page, true);
+  }
+
+  async getPodcasts(): Promise<Channel> {
+    const tab = await this.getTabByURL('podcasts');
+    return new Channel(this.actions, tab.page, true);
+  }
+
   async getPlaylists(): Promise<Channel> {
     const tab = await this.getTabByURL('playlists');
     return new Channel(this.actions, tab.page, true);
@@ -217,6 +227,14 @@ export default class Channel extends TabbedFeed<IBrowseResponse> {
     return this.hasTabWithURL('streams');
   }
 
+  get has_releases(): boolean {
+    return this.hasTabWithURL('releases');
+  }
+
+  get has_podcasts(): boolean {
+    return this.hasTabWithURL('podcasts');
+  }
+
   get has_playlists(): boolean {
     return this.hasTabWithURL('playlists');
   }

deno/src/parser/youtube/VideoInfo.ts

@@ -99,6 +99,28 @@ class VideoInfo extends MediaInfo {
     this.captions = info.captions;
     this.cards = info.cards;
 
+    if (this.streaming_data) {
+      const default_audio_track = this.streaming_data.adaptive_formats.find((format) => format.audio_track?.audio_is_default);
+      if (default_audio_track) {
+        // The combined formats only exist for the default language, even for videos with multiple audio tracks
+        // So we can copy the language from the default audio track to the combined formats
+        this.streaming_data.formats.forEach((format) => format.language = default_audio_track.language);
+      } else if (typeof this.captions?.default_audio_track_index !== 'undefined' && this.captions?.audio_tracks && this.captions.caption_tracks) {
+        // For videos with a single audio track and captions, we can use the captions to figure out the language of the audio and combined formats
+        const audioTrack = this.captions.audio_tracks[this.captions.default_audio_track_index];
+        const defaultCaptionTrackIndex = audioTrack.default_caption_track_index;
+        const index = audioTrack.caption_track_indices[defaultCaptionTrackIndex ? defaultCaptionTrackIndex : 0];
+        const language_code = this.captions.caption_tracks[index].language_code;
+
+        this.streaming_data.adaptive_formats.forEach((format) => {
+          if (format.has_audio) {
+            format.language = language_code;
+          }
+        });
+        this.streaming_data.formats.forEach((format) => format.language = language_code);
+      }
+    }
+
     const two_col = next?.contents?.item().as(TwoColumnWatchNextResults);
 
     const results = two_col?.results;

deno/src/utils/FormatUtils.ts

@@ -146,7 +146,7 @@ class FormatUtils {
             chunk_end += chunk_size;
 
             resolve();
-            return;
+
           } catch (e: any) {
             reject(e);
           }
@@ -373,10 +373,17 @@ class FormatUtils {
             label: first_format.audio_track?.display_name as string
           }, children);
 
+          const hoisted: string[] = [];
+
+          this.#hoistCodecsIfPossible(set, track_objects[j], hoisted);
+          this.#hoistNumberAttributeIfPossible(set, track_objects[j], 'audioSamplingRate', 'audio_sample_rate', hoisted);
+
+          this.#hoistAudioChannelsIfPossible(document, set, track_objects[j], hoisted);
+
           period.appendChild(set);
 
           for (const format of track_objects[j]) {
-            await this.#generateRepresentationAudio(document, set, format, url_transformer, cpn, player, actions);
+            await this.#generateRepresentationAudio(document, set, format, url_transformer, hoisted, cpn, player, actions);
           }
         }
       } else {
@@ -387,43 +394,179 @@ class FormatUtils {
           subsegmentAlignment: 'true'
         });
 
+        const color_info = mime_objects[i][0].color_info;
+        if (typeof color_info !== 'undefined') {
+          // Section 5.5 Video source metadata signalling https://dashif.org/docs/IOP-Guidelines/DASH-IF-IOP-Part7-v5.0.0.pdf
+          // Section 8 Video code points https://www.itu.int/rec/T-REC-H.273-202107-I/en
+          // The player.js file was also helpful
+
+          if (color_info.primaries) {
+            let primaries = '';
+
+            switch (color_info.primaries) {
+              case 'BT709':
+                primaries = '1';
+                break;
+              case 'BT2020':
+                primaries = '9';
+                break;
+            }
+
+            if (primaries !== '') {
+              set.appendChild(this.#el(document, 'EssentialProperty', {
+                schemeIdUri: 'urn:mpeg:mpegB:cicp:ColourPrimaries',
+                value: primaries
+              }));
+            }
+          }
+
+          if (color_info.transfer_characteristics) {
+            let transfer_characteristics = '';
+
+            switch (color_info.transfer_characteristics) {
+              case 'BT709':
+                transfer_characteristics = '1';
+                break;
+              case 'BT2020_10':
+                transfer_characteristics = '14';
+                break;
+              case 'SMPTEST2084':
+                transfer_characteristics = '16';
+                break;
+              case 'ARIB_STD_B67':
+                transfer_characteristics = '18';
+                break;
+            }
+
+            if (transfer_characteristics !== '') {
+              set.appendChild(this.#el(document, 'EssentialProperty', {
+                schemeIdUri: 'urn:mpeg:mpegB:cicp:TransferCharacteristics',
+                value: transfer_characteristics
+              }));
+            }
+          }
+
+
+          if (color_info.matrix_coefficients) {
+            let matrix_coefficients = '';
+
+            // This list is incomplete, as the player.js doesn't currently have any code for matrix coefficients,
+            // So it doesn't have a list like with the other two, so this is just based on what we've seen in responses
+            switch (color_info.matrix_coefficients) {
+              case 'BT709':
+                matrix_coefficients = '1';
+                break;
+              case 'BT2020_NCL':
+                matrix_coefficients = '14';
+                break;
+              default: {
+                const format = mime_objects[i][0];
+                const url = new URL(format.url as string);
+
+                const anonymisedFormat = JSON.parse(JSON.stringify(format));
+                anonymisedFormat.url = 'REDACTED';
+                anonymisedFormat.signature_cipher = 'REDACTED';
+                anonymisedFormat.cipher = 'REDACTED';
+
+                console.warn(`YouTube.js toDash(): Unknown matrix coefficients "${color_info.matrix_coefficients}", the DASH manifest is still usuable without this.\n`
+                  + `Please report it at ${Platform.shim.info.bugs_url} so we can add support for it.\n`
+                  + `Innertube client: ${url.searchParams.get('c')}\nformat:`, anonymisedFormat);
+              }
+            }
+
+            if (matrix_coefficients !== '') {
+              set.appendChild(this.#el(document, 'EssentialProperty', {
+                schemeIdUri: 'urn:mpeg:mpegB:cicp:MatrixCoefficients',
+                value: matrix_coefficients
+              }));
+            }
+          }
+        }
+
+        const hoisted: string[] = [];
+
+        this.#hoistCodecsIfPossible(set, mime_objects[i], hoisted);
+
+        if (mime_objects[i][0].has_audio) {
+          this.#hoistNumberAttributeIfPossible(set, mime_objects[i], 'audioSamplingRate', 'audio_sample_rate', hoisted);
+
+          this.#hoistAudioChannelsIfPossible(document, set, mime_objects[i], hoisted);
+
+          const language = mime_objects[i][0].language;
+          if (language) {
+            set.setAttribute('lang', language);
+          }
+        } else {
+          set.setAttribute('maxPlayoutRate', '1');
+
+          this.#hoistNumberAttributeIfPossible(set, mime_objects[i], 'frameRate', 'fps', hoisted);
+        }
+
         period.appendChild(set);
 
         for (const format of mime_objects[i]) {
           if (format.has_video) {
-            await this.#generateRepresentationVideo(document, set, format, url_transformer, cpn, player, actions);
+            await this.#generateRepresentationVideo(document, set, format, url_transformer, hoisted, cpn, player, actions);
           } else {
-            await this.#generateRepresentationAudio(document, set, format, url_transformer, cpn, player, actions);
+            await this.#generateRepresentationAudio(document, set, format, url_transformer, hoisted, cpn, player, actions);
           }
         }
       }
     }
   }
 
-  static async #generateRepresentationVideo(document: XMLDocument, set: Element, format: Format, url_transformer: URLTransformer, cpn?: string, player?: Player, actions?: Actions) {
-    const codecs = getStringBetweenStrings(format.mime_type, 'codecs="', '"');
+  static #hoistCodecsIfPossible(set: Element, formats: Format[], hoisted: string[]) {
+    if (formats.length > 1 && new Set(formats.map((format) => getStringBetweenStrings(format.mime_type, 'codecs="', '"'))).size === 1) {
+      set.setAttribute('codecs', getStringBetweenStrings(formats[0].mime_type, 'codecs="', '"') as string);
+      hoisted.push('codecs');
+    }
+  }
 
+  static #hoistNumberAttributeIfPossible(set: Element, formats: Format[], attribute: 'audioSamplingRate' | 'frameRate', property: 'audio_sample_rate' | 'fps', hoisted: string[]) {
+    if (formats.length > 1 && new Set(formats.map((format) => format.fps)).size === 1) {
+      set.setAttribute(attribute, formats[0][property]?.toString() as string);
+      hoisted.push(attribute);
+    }
+  }
+
+  static #hoistAudioChannelsIfPossible(document: XMLDocument, set: Element, formats: Format[], hoisted: string[]) {
+    if (formats.length > 1 && new Set(formats.map((format) => format.audio_channels?.toString() || '2')).size === 1) {
+      set.appendChild(
+        this.#el(document, 'AudioChannelConfiguration', {
+          schemeIdUri: 'urn:mpeg:dash:23003:3:audio_channel_configuration:2011',
+          value: formats[0].audio_channels?.toString() || '2'
+        })
+      );
+      hoisted.push('AudioChannelConfiguration');
+    }
+  }
+
+  static async #generateRepresentationVideo(document: XMLDocument, set: Element, format: Format, url_transformer: URLTransformer, hoisted: string[], cpn?: string, player?: Player, actions?: Actions) {
     const url = new URL(format.decipher(player));
     url.searchParams.set('cpn', cpn || '');
 
     const representation = this.#el(document, 'Representation', {
       id: format.itag?.toString(),
-      codecs,
       bandwidth: format.bitrate?.toString(),
       width: format.width?.toString(),
-      height: format.height?.toString(),
-      maxPlayoutRate: '1',
-      frameRate: format.fps?.toString()
+      height: format.height?.toString()
     });
 
+    if (!hoisted.includes('codecs')) {
+      const codecs = getStringBetweenStrings(format.mime_type, 'codecs="', '"');
+      representation.setAttribute('codecs', codecs as string);
+    }
+
+    if (!hoisted.includes('frameRate')) {
+      representation.setAttribute('frameRate', format.fps?.toString() as string);
+    }
+
     set.appendChild(representation);
 
     await this.#generateSegmentInformation(document, representation, format, url_transformer(url)?.toString(), actions);
   }
 
-  static async #generateRepresentationAudio(document: XMLDocument, set: Element, format: Format, url_transformer: URLTransformer, cpn?: string, player?: Player, actions?: Actions) {
-    const codecs = getStringBetweenStrings(format.mime_type, 'codecs="', '"');
-
+  static async #generateRepresentationAudio(document: XMLDocument, set: Element, format: Format, url_transformer: URLTransformer, hoisted: string[], cpn?: string, player?: Player, actions?: Actions) {
     const url = new URL(format.decipher(player));
     url.searchParams.set('cpn', cpn || '');
 
@@ -436,15 +579,26 @@ class FormatUtils {
 
     const representation = this.#el(document, 'Representation', {
       id,
-      codecs,
-      bandwidth: format.bitrate?.toString(),
-      audioSamplingRate: format.audio_sample_rate?.toString()
-    }, [
-      this.#el(document, 'AudioChannelConfiguration', {
-        schemeIdUri: 'urn:mpeg:dash:23003:3:audio_channel_configuration:2011',
-        value: format.audio_channels?.toString() || '2'
-      })
-    ]);
+      bandwidth: format.bitrate?.toString()
+    });
+
+    if (!hoisted.includes('codecs')) {
+      const codecs = getStringBetweenStrings(format.mime_type, 'codecs="', '"');
+      representation.setAttribute('codecs', codecs as string);
+    }
+
+    if (!hoisted.includes('audioSamplingRate')) {
+      representation.setAttribute('audioSamplingRate', format.audio_sample_rate?.toString() as string);
+    }
+
+    if (!hoisted.includes('AudioChannelConfiguration')) {
+      representation.appendChild(
+        this.#el(document, 'AudioChannelConfiguration', {
+          schemeIdUri: 'urn:mpeg:dash:23003:3:audio_channel_configuration:2011',
+          value: format.audio_channels?.toString() || '2'
+        })
+      );
+    }
 
     set.appendChild(representation);