title: Youtube fullscreen doesn't work in WinForms webBrowser
body: <p>I'm making a simple WinForms app and I'm having problems with trying to make a YouTube video fullscreen from the webBrowser control (when clicking on the embedded YouTube fullscreen button).</p>
  
  <p>I've got a simple window with a webBrowser in it (no properties changed on the webBrowser other than "Dock", "ScrollBarsEnabled", and "Url"). The URL is, for example, <a href="https://www.youtube.com/v/qRv7G7WpOoU" rel="nofollow">https://www.youtube.com/v/qRv7G7WpOoU</a> . After running in debug mode, if I click on the YouTube video's fullscreen button it does nothing.</p>
  
  <p>Alternatively, if I use a link for a Vimeo video (e.g. <a href="https://player.vimeo.com/video/40767916" rel="nofollow">https://player.vimeo.com/video/40767916</a> ), the fullscreen button from the Vimeo player works just fine.</p>
  
  <p>(I have also tried using the Awesomium webControl with the same results)</p>
  
  <p>Any insights into what I might be doing wrong?</p>