WebM, VP8, Flash Player, and IE9

It seems Adobe and Microsoft will join the effort of Google's opening source of the popular video codec, VP8, such as used in YouTube and QQ, a major messaging software in China. Mozilla and Opera are certainly fans of VP8 since it is license free, comparing to H.264.

http://blogs.adobe.com/flashplatform/2010/05/adobe_support_for_webm.html

http://windowsteamblog.com/windows/b/bloggingwindows/archive/2010/05/19/another-follow-up-on-html5-video-in-ie9.aspx

Here is the Google's WebM project place:

http://www.webmproject.org/