updated youtube module in response to google issue 5670

As a result of Youtube Iframe API's update, the player's important events, `onReady` and `onStateChange` do not fire unless `origin` parameter is set as `window.location.origin` in the iframe's src. This is a result of Google issue [5670](https://code.google.com/p/gdata-issues/issues/detail?id=5670). This commit fixes the issue by specifying the origin when initializing iframe players.