Pasted

<div id="player"></div>
<script src="http://www.youtube.com/player_api"></script>
<script>
    // create youtube player
    var player;
    function onYouTubePlayerAPIReady()
    {
        player = new YT.Player('player',
        {
            width: '560',
            height: '315',
            videoId: 'g-JWRqzLZRk',
            events:
            {
                'onReady': onPlayerReady,
                'onStateChange': onPlayerStateChange
            }
        });
    }
    // autoplay video
    function onPlayerReady(event)
    {
        event.target.playVideo();
    }
    // when video ends
    function onPlayerStateChange(event)
    {        
        if (event.data===0)
        {          
            /** here put code to be triggered when video ends ! **/
        }
    }
</script>