How can I increase the video size and width to this code?

1 
<!-- Add a placeholder for the Twitch embed -->
<div id="twitch-embed"></div>

<!-- Load the Twitch embed script -->
<script src="https://player.twitch.tv/js/embed/v1.js"></script>

<!-- Create a Twitch.Player object. This will render within the placeholder div -->
<script type="text/javascript">
  new Twitch.Player("twitch-embed", {
    channel: "greenmountroadcoc"
  });
</script>
2

Tried passing a height/width property to Twitch.Player?

<script type="text/javascript">
  new Twitch.Player("twitch-embed", {
    channel: "greenmountroadcoc",
    width: 854,
    height: 480
  });
</script>