title: Youtube iframe embedded video not working (black screen)
body: <p>On Diveboard, we made a nice hack of photoswipe to support videos</p>
  
  <p>Everything went well until I discovered Firefox 11 and 12 beta are not playing the youtube videos embedded any more... it seems they are loaded, we can hear sound ad pufff no images... so it's youtube radio instead
  you can see an example here : <a href="http://scu.bz/p/1716" rel="nofollow">Video example page</a></p>
  
  <p>And i've been scratching my head over and over on that one but I'm clueless :( :(</p>
  
  <p>EDIT : Apparently it's an issue ONLY ON OSX!!! which makes me even more clueless...</p>
  
  <p>Any hint would be apreciated</p>
  
  <p>the iframe code is pretty straightforward: </p>
  
  <pre><code>&lt;iframe width='#{width}' height='#{height}' src='http://www.youtube.com/embed/#{matchdata}?wmode=opaque&amp;autoplay=1' frameborder='0' allowfullscreen&gt;&lt;/iframe&gt;
  </code></pre>