title: YouTube iFrame API quality parameter "vq" bug - video playback with black screen
body: <p>There seems to be a huge issue with the iframe url parameter "vq" (in this case "vq=hd720").
  If you use this paraneter, the video screen in the flash player turns black.</p>
  
  <p>This example URL worked until today:</p>
  
  <p><a href="http://www.youtube.com/embed/dFVDJlM6zLY?vq=hd720" rel="nofollow noreferrer">http://www.youtube.com/embed/dFVDJlM6zLY?vq=hd720</a></p>
  
  <p>(feel free to replace the example YouTube ID)</p>
  
  <p>Now, this example works only without the "vq" parameter (vq=hd720):</p>
  
  <p><a href="http://www.youtube.com/embed/dFVDJlM6zLY" rel="nofollow noreferrer">http://www.youtube.com/embed/dFVDJlM6zLY</a></p>
  
  <p>The problem is, that we delivered this YouTube iframe in a lot of websites for a lot of clients and it worked quite well for month (years?). Now every single site has black youtube videos!!!</p>
  
  <p>Does anyone know if this parameter was depricated?</p>
  
  <p>Was there a new YouTube API release today?</p>
  
  <p>The parameter was already discussed and recommended in diffrent forums:</p>
  
  <p>e.g. <a href="https://stackoverflow.com/questions/7582336/force-youtube-embed-to-start-in-720p">Force youtube embed to start in 720p</a></p>
  
  <p>Any ideas how to force Google (YouTube) to solve this problem?</p>