youtube-unblocker.user.js

// ==UserScript==
// @name         Youtube Unblocker
// @namespace    https://greasyfork.org/users/649
// @version      3.0.23
// @description  Auto redirects blocked videos to the mirror site hooktube.com
// @author       Adrien Pyke
// @match        *://www.youtube.com/*
// @match        *://hooktube.com/watch*
// @grant        GM_getValue
// @grant        GM_setValue
// @grant        GM_registerMenuCommand
// @require      https://cdn.jsdelivr.net/gh/kufii/My-UserScripts@22210afba13acf7303fc91590b8265faf3c7eda7/libs/gm_config.js
// @require      https://cdn.jsdelivr.net/gh/fuzetsu/userscripts@ec863aa92cea78a20431f92e80ac0e93262136df/wait-for-elements/wait-for-elements.js
// ==/UserScript==

(() => {
  'use strict';

  const Util = {
    q(query, context = document) {
      return context.querySelector(query);
    },
    qq(query, context = document) {
      return Array.from(context.querySelectorAll(query));
    }
  };

  const Config = GM_config([
    {
      key: 'autoplay',
      label: 'Autoplay',
      default: true,
      type: 'bool'
    }
  ]);
  GM_registerMenuCommand('Youtube Unblocker Settings', Config.setup);

  if (location.hostname === 'www.youtube.com') {
    waitForElems({
      sel: '#page-manager',
      stop: true,
      onmatch(page) {
        setTimeout(() => {
          const redirect = function () {
            location.replace(
              `${location.protocol}//hooktube.com/watch${location.search}`
            );
          };
          if (page.querySelector('[player-unavailable]')) {
            redirect();
          } else {
            setTimeout(() => {
              if (!Util.q('#page-manager').innerHTML.trim()) {
                redirect();
              }
            }, 5);
          }
        }, 0);
      }
    });
  } else {
    const cfg = Config.load();
    if (!cfg.autoplay) {
      waitForElems({
        sel: '#player-obj',
        stop: true,
        onmatch(video) {
          video.pause();
        }
      });
      document.querySelector('#player-obj').pause();
    }
  }
})();