<!DOCTYPE html>
<html lang="en-US">
<head>
<style>
video{
width:100%;
height:330px
}
</style>
</head>
<body>
<p>Refresh this page and immediately go to any other tabs in your browser. Then the 'stalled' event will be triggered within 5 seconds.</p>
<video controls>
<source src="blabla.mp4" type="video/mp4">
</video>
<script>
var x = document.getElementsByTagName("video")[0];
function myFunction(){
alert("Unable to fetch the media data");
}
x.addEventListener("stalled", myFunction);
</script>
<p><strong>Note</strong> : We don't have blabla.mp4.</p> </body>
</html>