title: API to make youtube full screen on chromecast
body: <p>Can the Chromecast browser allow the iframe Youtube player to be set into full screen mode.  Want to use this for a screen saver mode.  Normally player not full screen, but if no sessions are doing anything then I want to take it to full screen while the playlist is playing. </p>
  
  <p>I do not want to start it up in full screen, I want to switch to full screen after 3 minutes of inactivity on the chromecast receiver.</p>