// ==UserScript==// @name                Disable YouTube AV1// @description         Disable AV1 for video playback on YouTube// @name:zh-TW          停用 YouTube AV1// @description:zh-TW   停用 YouTube 的 AV1 影片播放// @name:zh-HK          停用 YouTube AV1// @description:zh-HK   停用 YouTube 的 AV1 影片播放// @name:zh-CN          停用 YouTube AV1// @description:zh-CN   停用 YouTube 的 AV1 视频播放// @name:ja             YouTube AV1 停用// @description:ja      YouTube の動画再生に AV1 を停用する// @name:ko             YouTube AV1 비활성화// @description:ko      YouTube의 동영상 재생에 AV1을 비활성화하기// @name:vi             Vô hiệu hóa YouTube AV1// @description:vi      Vô hiệu hóa AV1 để phát video trên YouTube// @name:de             YouTube AV1 deaktivieren// @description:de      Deaktiviert AV1 für die Videowiedergabe auf YouTube// @name:fr             Désactiver YouTube AV1// @description:fr      Désactivez AV1 pour la lecture des vidéos sur YouTube// @name:it             Disabilita YouTube AV1// @description:it      Disabilita AV1 per la riproduzione dei video su YouTube// @name:es             Desactivar AV1 en YouTube// @description:es      Desactivar AV1 para la reproducción de videos en YouTube// @namespace           http://tampermonkey.net/// @version             2.4.3// @author              CY Fung// @match               https://www.youtube.com/*// @match               https://www.youtube.com/embed/*// @match               https://www.youtube-nocookie.com/embed/*// @exclude             https://www.youtube.com/live_chat*// @exclude             https://www.youtube.com/live_chat_replay*// @exclude             /^https?://\S+\.(txt|png|jpg|jpeg|gif|xml|svg|manifest|log|ini)[^\/]*$/// @icon                https://www.google.com/s2/favicons?sz=64&domain=youtube.com// @grant               none// @run-at              document-start// @license             MIT// @compatible          chrome// @compatible          firefox// @compatible          opera// @compatible          edge// @compatible          safari// @unwrap// @allFrames           true// @inject-into         page// ==/UserScript==(function () {'use strict';console.debug("disable-youtube-av1", "injected");const flagConfig = () => {let firstDa = true;let cid = 0;const { setInterval, clearInterval, setTimeout } = window;const tn = () => {const da = (window.ytcfg && window.ytcfg.data_) ? window.ytcfg.data_ : null;if (!da) return;const isFirstDa = firstDa;firstDa = false;for (const EXPERIMENT_FLAGS of [da.EXPERIMENT_FLAGS, da.EXPERIMENTS_FORCED_FLAGS]) {if (EXPERIMENT_FLAGS) {// EXPERIMENT_FLAGS.html5_disable_av1_hdr = true;// EXPERIMENT_FLAGS.html5_prefer_hbr_vp9_over_av1 = true;}}if (isFirstDa) {let mo = new MutationObserver(() => {mo.disconnect();mo.takeRecords();mo = null;setTimeout(() => {cid && clearInterval.call(window, cid);cid = 0;tn();})});mo.observe(document, { subtree: true, childList: true });}};cid = setInterval.call(window, tn);};const supportedFormatsConfig = () => {function typeTest(type) {if (typeof type === 'string' && type.startsWith('video/')) {if (type.includes('av01')) {if (/codecs[\x20-\x7F]+\bav01\b/.test(type)) return false;} else if (type.includes('av1')) {if (/codecs[\x20-\x7F]+\bav1\b/.test(type)) return false;}}}// return a custom MIME type checker that can defer to the original functionfunction makeModifiedTypeChecker(origChecker, dx) {// Check if a video type is allowedreturn function (type) {let res = undefined;if (type === undefined) res = false;else res = typeTest(type);if (res === undefined) res = origChecker.apply(this, arguments);else res = !dx ? res : (res ? "probably" : "");// console.debug(20, type, res)return res;};}// Override video element canPlayType() functionconst proto = (HTMLVideoElement || 0).prototype;if (proto && typeof proto.canPlayType == 'function') {proto.canPlayType = makeModifiedTypeChecker(proto.canPlayType, true);}// Override media source extension isTyp###pported() functionconst mse = window.MediaSource;// Check for MSE support before useif (mse && typeof mse.isTyp###pported == 'function') {mse.isTyp###pported = makeModifiedTypeChecker(mse.isTyp###pported);}};function disableAV1() {// This is the setting to disable AV1// localStorage['yt-player-av1-pref'] = '-1';try {Object.defineProperty(localStorage.constructor.prototype, 'yt-player-av1-pref', {get() {if (this === localStorage) return '-1';return this.getItem('yt-player-av1-pref');},set(nv) {this.setItem('yt-player-av1-pref', nv);return true;},enumerable: true,configurable: true});} catch (e) {// localStorage['yt-player-av1-pref'] = '-1';}if (localStorage['yt-player-av1-pref'] !== '-1') {console.warn('Disable YouTube AV1', '"yt-player-av1-pref = -1" is not supported in your browser.');return;}console.debug("disable-youtube-av1", "AV1 disabled by yt-player-av1-pref = -1");}disableAV1();// flagConfig();supportedFormatsConfig();})();