HTML5 embedded youtube videos

Changes the way of embedding youtube videos from old 'object' to new 'iframe'
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// ==UserScript==
// @name           HTML5 embedded youtube videos
// @namespace      html5
// @description    Changes the way of embedding youtube videos from old 'object' to new 'iframe' 
// @include        *
// @author         original script by Mikhail Khvoinitsky in (2010 https://userscripts-mirror.org/scripts/show/82749 updated in 2020 to add https to remove mixed content error.
// @version        0.3
// ==/UserScript==  


var insertLink = 1;



var n = 0;
while (document.getElementsByTagName("object")[n] != undefined)
{
  
    var currentElement = document.getElementsByTagName("object")[n];
  
      if (currentElement.getElementsByTagName("embed")[0] == undefined){
      }

  
      if (currentElement.getElementsByTagName("embed")[0] != undefined)
      {  
      		if ((currentElement.getElementsByTagName("embed")[0].src.indexOf("http://youtube.com/") == 0) 
          || (currentElement.getElementsByTagName("embed")[0].src.indexOf("http://www.youtube-nocookie.com/") == 0))
    			{
            
              var newElement = document.createElement('iframe');
              newElement.setAttribute('class', 'youtube-player');
              newElement.setAttribute('width', currentElement.width);
              newElement.setAttribute('height', currentElement.height);
              
              var src = currentElement.getElementsByTagName("embed")[0].src;
              newElement.setAttribute('frameborder', '0');
              src = src.replace('.com/v/', '.com/embed/');
            	src = src.replace('http:', 'https:');
              src = src.split('&')[0];
              newElement.setAttribute('src', src);
              currentElement.parentNode.insertBefore(newElement, currentElement);
              if (insertLink == 1)
              {
                  var link = document.createElement('a');
                  link.setAttribute('href', 'https://www.youtube.com/watch?v=' + src.substring(src.lastIndexOf('/') + 1, src.length));
                  link.innerHTML = 'Watch this video on Youtube';
                  var br = document.createElement('br');
                  currentElement.parentNode.insertBefore(br, currentElement);
                  currentElement.parentNode.insertBefore(link, currentElement);
              }
              currentElement.parentNode.removeChild(currentElement);
              n--;
         }
         n++;
      }
}