Basic implementation:
<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,
channel: "monstercat",
};
var player = new Twitch.Player("PLAYER_DIV_ID", options);
player.setVolume(0.5);
</script>
With controls hidden:
<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,
channel: "monstercat",
controls: false,
};
var player = new Twitch.Player("PLAYER_DIV_ID", options);
player.setVolume(0.5);
</script>