Before dismissing Ogg, I suggest taking a look at a somewhat recent head-to-head comparison:<p><a href="http://people.xiph.org/~greg/video/ytcompare/comparison.html" rel="nofollow">http://people.xiph.org/~greg/video/ytcompare/comparison.html</a><p>It appears that Theora could easily replace H.263 as a low-end codec and would be competitive with H.264 as a high-end codec.