Wikipedia Artikel dazu (natürlich englische WP, denn die Deutsche kennt sowas nicht):
LinkIm HTML5 Draft steht:
"
It would be helpful for interoperability if all browsers could support the same codecs. However, there are no known codecs that satisfy all the current players: we need a codec that is known to not require per-unit or per-distributor licensing, that is compatible with the open source development model, that is of sufficient quality as to be usable, and that is not an additional submarine patent risk for large companies. This is an ongoing issue and this section will be updated once more information is available."
Aber wird vielleicht noch. Wie geht eigentlich YouTube auf iPhone und iPad oO?