<i>"But minority browsers don't use as much CPU while playing HTML5 video tag data."<p>Are you sure about that?</i><p>Yes.<p>I just tried it again to be doubly sure. In Chrome the YouTube HTML 5 demo uses 2/3 of the CPU used by the Flash-based version. In Firefox playing the demo ogg files at: <a href="http://people.xiph.org/~greg/video/ytcompare/comparison.html" rel="nofollow">http://people.xiph.org/~greg/video/ytcompare/comparison.html</a> uses about half the CPU than playing the video with Flash in YouTube. This is all in Linux.