title: IFrame "allowfullscreen" attribute not working in Chrome
body: <p>I am trying to set the <code>allowFullScreen</code> attribute of an <code>IFRAME</code> using Javascript as follows:</p>
  
  <pre><code>media_element = document.createElement("IFRAME");
  media_element.src = "//www.youtube.com/embed/" + getId(media_link);
  media_element.allowFullScreen = true;
  </code></pre>
  
  <p>However, this does not work in Google Chrome. When I try to launch the video in full screen mode, I get <code>This video is not available in fullscreen</code> error. I haven't been able to find an attribute to set that works in Chrome.</p>