title: Youtube iframe API, subscribing to events
body: <p><a href="https://stackoverflow.com/questions/7443578/youtube-iframe-api-how-do-i-control-a-iframe-player-thats-already-in-the-html/7513356#7513356">YouTube iframe API: how do I control a iframe player that&#39;s already in the HTML?</a></p>
  
  <p>How do I subscribe to events here? I would like to listen for video finish.</p>