Mozilla is considering using H264

"Looks as though Mozilla is considering using H264, one step closer to unification of a single protocol for video encoding. It's a big deal for HTML5 traction, but it still leaves Google holding onto WebM." The article, though a bit harsh on Ogg Theora, offers an interesting look at the way standards are chosen (and adopted by the browser makers).

http://www.appleinsider.com/articles/12/03/14/mozilla_considers_h264_video_support_after_googles_vp8_fails_to_gain_traction.html