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https://github.com/erkserkserks/h264ify
// ==UserScript==
// @name YouTube H.264 (h264ify)
// @name:ru YouTube H.264 (h264ify)
// @namespace https://www.youtube.com
// @version 2023.11.19.1
// @description https://github.com/erkserkserks/h264ify
// @description:ru https://github.com/erkserkserks/h264ify
// @match *://*.youtube.com/*
// @match *://*.youtube-nocookie.com/*
// @match *://*.youtubekids.com/*
// @license MIT
// @grant none
// @run-at document-start
// ==/UserScript==
const block60fps = true;
function modifyVideoTypeChecker() {
const mediaSource = window.MediaSource;
if (mediaSource === undefined) return;
const originalIsTypeSupported = mediaSource.isTypeSupported.bind(mediaSource);
mediaSource.isTypeSupported = makeModifiedTypeChecker(originalIsTypeSupported);
}
const makeModifiedTypeChecker = (originalChecker) => (type) => {
if (typeof type !== 'string') return '';
const disallowedTypes = ['webm', 'vp8', 'vp9', 'av01'];
for (const disallowedType of disallowedTypes) {
if (type.includes(disallowedType)) return '';
}
if (block60fps) {
const match = /framerate=(\d+)/.exec(type);
if (match && match[1] > 30) return '';
}
return typeof originalChecker === 'function' ? originalChecker(type) : '';
};
modifyVideoTypeChecker();
