Controlling Multimedia

Dear LearVern ,

My Advance in JavaScript or Controlling Multimedia in js in javaScript does not Run in browser please help me .
Please check my cods links and reply.

Controlling Multimedia
<script type="text/javascript">
	function play() {
		if(!document.demo.Isplaying()){
			document.demo.play();
		}
	}

	function Stop() {
		if(document.demo.Isplaying()){
			document.demo.Stopplay();
		}
	}

	function Stop() {
		if(document.demo.Isplaying()){
			document.demo.Stopplay();
		}
		document.demo.Rewind();
	}
</script>

Controlling Multimedia

<embed id="demo" name= "demo" src="https://www.youtube.com/watch?v=bi5PhlIQpwU" height="300" width="300" onplay="false" loop= "fase" pluginspage="https://chrome.google.com/webstore/detail/office-editing-for-docs-s/gbkeegbaiigmenfmjfclcdgdpimamgkj"></embed>

<form name="form" id="form" action="get">
	<input type="button" value="Start" onclick="play()">
	<input type="button" value="Stop" onclick="Stop()">
	<input type="button" value="Rewind" onclick="Rewind()">
</form>