JS HTML 5 Check Video/Audio Network State & Set Cross Orgin

<html>
<body>

<button onclick="getVidNetworkState();" type="button">Get The Network State Of The Current Video/Audio File </button><br>

<video id="video" width="325" height="325" controls>
<source src="mov_bbb.mp4" type="video/mp4">
</video>

<script>
var vid = document.getElementById("video");
vid.src= prompt('Enter Video URL:');
function getVidNetworkState(str) {
vid.crossOrign=true;
if(vid.networkState==3){
alert('No Video Found!!');
}
if(vid.networkState==1){
alert('Video Was Found!!');
}
}
</script>

</html>