LayoutTests/media/progress-event.html

<video src="content/test.mp4"></video>
<script src=video-test.js></script>
<script>
waitForEventAndTest("begin", "!event.lengthComputable && event.loaded==0 && event.total==0");
waitForEventTestAndEnd("load", "event.lengthComputable && event.loaded>0 && event.total>0");
</script>