Youtube: Show related videos if missing

On pages of age-restricted videos, related videos are missing. This script re-adds the related videos.

Tendrás que instalar una extensión para tu navegador como Tampermonkey, Greasemonkey o Violentmonkey si quieres utilizar este script.

You will need to install an extension such as Tampermonkey to install this script.

Necesitarás instalar una extensión como Tampermonkey o Violentmonkey para instalar este script.

Necesitarás instalar una extensión como Tampermonkey o Userscripts para instalar este script.

Necesitará instalar una extensión como Tampermonkey para instalar este script.

Necesitarás instalar una extensión para administrar scripts de usuario si quieres instalar este script.

(Ya tengo un administrador de scripts de usuario, déjame instalarlo)

Necesitará instalar una extensión como Stylus para instalar este estilo.

Necesitará instalar una extensión como Stylus para instalar este estilo.

Necesitará instalar una extensión como Stylus para instalar este estilo.

Necesitará instalar una extensión del gestor de estilos de usuario para instalar este estilo.

Necesitará instalar una extensión del gestor de estilos de usuario para instalar este estilo.

Necesitará instalar una extensión del gestor de estilos de usuario para instalar este estilo.

(Ya tengo un administrador de estilos de usuario, déjame instalarlo)

// ==UserScript==
// @name           Youtube: Show related videos if missing
// @name:de        Youtube: Zeige Videovorschläge an, falls sie fehlen
// @namespace      tfr
// @description    On pages of age-restricted videos, related videos are missing. This script re-adds the related videos.
// @description:de Auf Seiten altersbeschränkter Videos fehlen die Videovorschläge. Dieses Skript fügt sie wieder hinzu.
// @author         tfr (https://github.com/t-fr/)
// @license        CC0; https://creativecommons.org/publicdomain/zero/1.0/
// @license        MIT license; https://pastebin.com/raw.php?i=4TMeeUXC
// @compatible     firefox Works with Firefox and Greasemonkey
// @incompatible   chrome Does not work with Chrome and Tampermonkey
// @compatible     opera Works with Opera and Violent monkey, but not with Tampermonkey Beta
// @oujs:author    tfr
// @include        http://www.youtube.com/watch?*
// @include        https://www.youtube.com/watch?*
// @version        4
// @grant          GM_xmlhttpRequest
// ==/UserScript==

/* This script is dual-licensed under CC0 and the MIT license.
 * You can choose which one you want to use.
 * CC0 license: http://creativecommons.org/publicdomain/zero/1.0/deed.en
 * MIT license: https://pastebin.com/raw.php?i=4TMeeUXC
 *
 * Dieses Skript steht sowohl unter CC0 als auch unter der MIT-Lizenz.
 * Sie können sich aussuchen, welche Lizenz Sie nutzen.
 * CC0-Lizenz: http://creativecommons.org/publicdomain/zero/1.0/deed.de
 * MIT-Lizenz: https://pastebin.com/raw.php?i=4TMeeUXC
 */

/* Version 4: Do not write "by ..." in video title
 * Version 3: Update license information
 */

if (window.document.getElementById('watch7-sidebar-modules') && !window.document.getElementById('watch-related'))
{
  var videoid = window.location.search.substr(window.location.search.indexOf('v=') + 2);
  if (videoid.indexOf('&') > - 1)
  {
    videoid = videoid.substr(0, videoid.indexOf('&'));
  }
  videoid = decodeURIComponent(videoid);
  GM_xmlhttpRequest({
    method: 'GET',
    url: '//www.youtube.com/get_video_info?asv=3&video_id=' + videoid,
    onload: function (response)
    {
      if (response.status == 200)
      {
        var relatedList = response.responseText.substr(response.responseText.indexOf('rvs=') + 4);
        if (relatedList.indexOf('&') > - 1)
        {
          relatedList = relatedList.substr(0, relatedList.indexOf('&'));
        }
        relatedList = decodeURIComponent(relatedList);
        relatedListS = relatedList.split(',');
        var sidebarModules = window.document.getElementById('watch7-sidebar-modules');
        var sidebarSection = window.document.createElement('div');
        sidebarSection.setAttribute('class', 'watch-sidebar-section');
        sidebarModules.appendChild(sidebarSection);
        var sidebarBody = window.document.createElement('div');
        sidebarBody.setAttribute('class', 'watch-sidebar-body');
        sidebarSection.appendChild(sidebarBody);
        var relatedVideoList = window.document.createElement('ul');
        relatedVideoList.setAttribute('id', 'watch-related');
        relatedVideoList.setAttribute('class', 'video-list');
        sidebarBody.appendChild(relatedVideoList);
        for (var i = 0; i < relatedListS.length; i++)
        {
          if (relatedListS[i].indexOf('id=') > - 1 && relatedListS[i].indexOf('title=') > - 1 && relatedListS[i].indexOf('author=') > - 1 && relatedListS[i].indexOf('length_seconds=') > - 1)
          {
            var relatedId = relatedListS[i].substr(relatedListS[i].indexOf('id=') + 3);
            if (relatedId.indexOf('&') > - 1)
            {
              relatedId = relatedId.substr(0, relatedId.indexOf('&'));
            }
            relatedId = relatedId.replace(/\+/g, ' ');
            relatedId = decodeURIComponent(relatedId);
            var relatedTitle = relatedListS[i].substr(relatedListS[i].indexOf('title=') + 6);
            if (relatedTitle.indexOf('&') > - 1)
            {
              relatedTitle = relatedTitle.substr(0, relatedTitle.indexOf('&'));
            }
            relatedTitle = relatedTitle.replace(/\+/g, ' ');
            relatedTitle = decodeURIComponent(relatedTitle);
            var relatedAuthor = relatedListS[i].substr(relatedListS[i].indexOf('author=') + 7);
            if (relatedAuthor.indexOf('&') > - 1)
            {
              relatedAuthor = relatedAuthor.substr(0, relatedAuthor.indexOf('&'));
            }
            relatedAuthor = relatedAuthor.replace(/\+/g, ' ');
            relatedAuthor = decodeURIComponent(relatedAuthor);
            var relatedLength = relatedListS[i].substr(relatedListS[i].indexOf('length_seconds=') + 15);
            if (relatedLength.indexOf('&') > - 1)
            {
              relatedLength = relatedLength.substr(0, relatedLength.indexOf('&'));
            }
            relatedLength = relatedLength.replace(/\+/g, ' ');
            relatedLength = decodeURIComponent(relatedLength);
            var relatedLengthRest = parseInt(relatedLength);
            var relatedLengthStr = ':' + ((relatedLengthRest % 60) < 10 ? '0' : '') + (relatedLengthRest % 60).toString();
            relatedLengthRest = Math.floor(relatedLengthRest / 60);
            relatedLengthStr = (relatedLengthRest >= 60 && (relatedLengthRest % 60) < 10 ? '0' : '') + (relatedLengthRest % 60).toString() + relatedLengthStr;
            relatedLengthRest = Math.floor(relatedLengthRest / 60);
            relatedLengthStr = (relatedLengthRest > 0 ? relatedLengthRest.toString() + ':' + relatedLengthStr : relatedLengthStr);
            var listElem = window.document.createElement('li');
            listElem.setAttribute('class', 'video-list-item related-list-item show-video-time related-list-item-compact-video');
            relatedVideoList.appendChild(listElem);
            var listElemCont = window.document.createElement('div');
            listElemCont.setAttribute('class', 'content-wrapper');
            listElem.appendChild(listElemCont);
            var listElemContLink = window.document.createElement('a');
            listElemContLink.setAttribute('class', 'yt-uix-sessionlink content-link');
            listElemContLink.setAttribute('title', relatedTitle);
            listElemContLink.setAttribute('href', 'https://www.youtube.com/watch?v=' + relatedId);
            listElemCont.appendChild(listElemContLink);
            var listElemContLinkSpan1 = window.document.createElement('span');
            listElemContLinkSpan1.setAttribute('class', 'title');
            listElemContLinkSpan1.setAttribute('aria-describedby', 'description-id-' + i);
            listElemContLinkSpan1.appendChild(window.document.createTextNode(relatedTitle));
            listElemContLink.appendChild(listElemContLinkSpan1);
            var listElemContLinkSpan2 = window.document.createElement('span');
            listElemContLinkSpan2.setAttribute('id', 'description-id-' + i);
            listElemContLinkSpan2.setAttribute('class', 'accessible-description');
            listElemContLinkSpan2.appendChild(window.document.createTextNode((navigator.language.toLowerCase().substr(0, 2) == 'de' ? '- Dauer: ' : '- Duration: ') + relatedLengthStr));
            listElemContLink.appendChild(listElemContLinkSpan2);
            var listElemContLinkSpan3 = window.document.createElement('span');
            listElemContLinkSpan3.setAttribute('class', 'stat attribution');
            listElemContLinkSpan3.appendChild(window.document.createTextNode((navigator.language.toLowerCase().substr(0, 2) == 'de' ? 'von ' : 'by ') + relatedAuthor));
            listElemContLink.appendChild(listElemContLinkSpan3);
            var listElemThum = window.document.createElement('div');
            listElemThum.setAttribute('class', 'thumb-wrapper');
            listElem.appendChild(listElemThum);
            var listElemThumLink = window.document.createElement('a');
            listElemThumLink.setAttribute('class', 'yt-uix-sessionlink thumb-link');
            listElemThumLink.setAttribute('aria-hidden', 'true');
            listElemThumLink.setAttribute('tabindex', '-1');
            listElemThumLink.setAttribute('href', 'https://www.youtube.com/watch?v=' + relatedId);
            listElemThum.appendChild(listElemThumLink);
            var listElemThumLinkSpan = window.document.createElement('span');
            listElemThumLinkSpan.setAttribute('class', 'yt-uix-simple-thumb-wrap yt-uix-simple-thumb-related');
            listElemThumLinkSpan.setAttribute('data-vid', relatedId);
            listElemThumLinkSpan.setAttribute('tabindex', '0');
            listElemThumLink.appendChild(listElemThumLinkSpan);
            var listElemThumImg = window.document.createElement('img');
            listElemThumImg.setAttribute('width', '120');
            listElemThumImg.setAttribute('height', '90');
            listElemThumImg.setAttribute('aria-hidden', 'true');
            listElemThumImg.setAttribute('alt', '');
            listElemThumImg.setAttribute('src', '//i.ytimg.com/vi/' + relatedId + '/default.jpg');
            listElemThumLinkSpan.appendChild(listElemThumImg);
          }
        }
      }
    }
  });
}