I haven't seen a substantiated claim that shows that Ogg is bigger than H.264. I've see Chris DiBona claim it on WHATWG, but not back it up with numbers or experimentation. In fact, I posted a link above to someone who refutes that assertion:<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>That comparison, of course, is six months old and things change rapidly in a short span of time.