Youtube: Show related videos if missing

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

As of 22.08.2015. See ბოლო ვერსია.

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

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

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

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

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

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==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        3
// @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 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((navigator.language.toLowerCase().substr(0, 2) == 'de' ? 'von ' : 'by ') + 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);
          }
        }
      }
    }
  });
}