Youtube Iframe API says the following"
player.setPlaybackQuality(suggestedQuality:String):Void This function sets the suggested video quality for the current video. The function causes the video to reload at its current position in the new quality. If the playback quality does change, it will only change for the video being played. Calling this function does not guarantee that the playback quality will actually change. However, if the playback quality does change, the onPlaybackQualityChange event will fire, and your code should respond to the event rather than the fact that it called the setPlaybackQuality function.
I am working with the API and realize that for a video the default quality picked up was "large". Using the API, I am unable to set it to "hd720". Setting to any other quality fails. Also after the quality is set to "hd720", re-setting it to "large" also fails.
So can someone please explain me why this can happen? Thanks.