LayoutTests/media/video-size.html

<video controls></video>
<script src=video-test.js></script>
<script>
    testExpected("video.videoWidth", 0, "==");
    testExpected("video.videoHeight", 0, "==");

    waitForEvent('loadedmetadata', function () { 
        testExpected("video.videoWidth", 0, ">");
        testExpected("video.videoHeight", 0, ">");
        endTest();
    } );

    video.src = "content/test.mp4";
</script>