LayoutTests/media/video-dom-loopstart.html

<video src=content/test.mp4 loopcount=2 autoplay></video>
<script src=video-test.js></script>
<script>
video.loopStart = 1.0;
test("video.loopStart==1.0");
test("video.getAttribute('loopstart') == '1s'");
waitForEvent('play', function () { video.currentTime = 500; });
waitForEventTestAndEnd('timeupdate', "video.currentTime.toFixed(1) && video.currentLoop==1");
</script>