<script src= "http://player.twitch.tv/js/embed/v1.js"></script>
<div id="PLAYER_DIV_ID"></div>
<script type="text/javascript">
var options = {
width: 854,
height: 480,
video: "v53336925",
};
var player = new Twitch.Player("PLAYER_DIV_ID", options);
player.setVolume(0.5);
</script>
The above snippet will play the following video: twitch.tv/general_mittenz/v/53336925