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// ==UserScript==
// @name YouTube to Invidious video redirector
// @description When opening YouTube videos, redirect to an Invidious instance, but when going back from instance, don't redirect again
//
// @version 1.1
// @license MIT
// @author Syndamia
//
// @source https://gitlab.com/Syndamia/userscripts/-/blob/main/youtube-invidious-video-redirector.js
// @supportURL https://gitlab.com/Syndamia/userscripts/-/issues
// @homepage https://gitlab.com/Syndamia/userscripts/
// @icon https://upload.wikimedia.org/wikipedia/commons/a/a0/Invidious-logo.svg
//
// @namespace Syndamia
// @match *://www.youtube.com/*
// @run-at document-start
// ==/UserScript==
const invidiousInstance = 'yewtu.be';
const ytdObserver = new MutationObserver(function(mutations) {
// Detect when ytd-app element is present
if (document.getElementsByTagName('ytd-app').length > 0) {
// Attach the redirection function to it
const observer = new MutationObserver(redirect);
observer.observe(document.getElementsByTagName('ytd-app')[0], { childList: true, attributes: true, subtree: true, });
ytdObserver.disconnect();
}
});
ytdObserver.observe(document, {attributes: false, childList: true, characterData: false, subtree:true});
// Opening YouTube links in YouTube doesn't reload the page, but we know that if the page changes, ytd-app (element that contains the UI) will also change
// so, when ytd-app changes, we check if the link has changed, and redirect
function redirect() {
const latest = localStorage.getItem('LATEST'), loc = window.location.search.substr(3);
if (loc !== latest) {
localStorage.removeItem(latest);
localStorage.removeItem('LATEST');
}
if (window.location.pathname === '/' || localStorage.getItem(loc) === 'true') {
return;
}
localStorage.setItem(loc, true);
localStorage.setItem('LATEST', loc);
window.location.host = invidiousInstance;
}
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