var youTubePlayer:Object;

 

playerLoader = new Loader();

playerLoader.contentLoaderInfo.addEventListener(Event.INIT, onYouTubePlayerInit);

playerLoader.load(new URLRequest("http://www.youtube.com/apiplayer?version=3"));

addChild(playerLoader);

 

function onYouTubePlayerInit(e:Event):void {

        youTubePlayer = playerLoader.content;

        youTubePlayer.loadVideoByUrl("http://www.youtube.com/v/" + _videoId);

}