Errr yeah thats super invalid HTML…
You need a page that containts
<script src="https://embed.twitch.tv/embed/v1.js"></script>
<div id="test"></div>
<script type="text/javascript">
var parent = ['sites.google.com', 'www.gstatic.com', window.location.host];
console.log(parent);
document.getElementById('target_frame').setAttribute('src', document.getElementById('target_frame').getAttribute('src') + '&parent=' + parent.join('&parent='));
var options = {
width: 800,
height: 500,
channel: "monstercat",
allowfullscreen: false,
layout: "video-with-chat",
muted: true,
parent
};
var player = new Twitch.Embed("test", options);
</script>