LayoutTests/media/video-loopend.html

<video src=content/test.mp4 playcount=2 loopend=0.5s controls></video>
<p>Test that video loops when time reaches the value specified by the loopEnd attribute.</p>
<script src=video-test.js></script>
<script>
test("video.loopEnd==0.5");
setTimeout(function () { test("video.currentTime<=0.5"); }, 2000);
waitForEvent('timeupdate', function () {
    if (video.currentLoop == 1) {
        test("video.currentLoop == 1");
        test("video.currentTime.toFixed(1) == 0");
        endTest();
    }
});
run("video.play()");
</script>