VideoPress supports Ogg
As strong believers in open source technology, we were excited when Firefox started supporting the new HTML video tag this past summer. It has the potential to transform the future of online video.
While we are still working on adding full support for video tag, we are happy to announce that we have encoded all of our video inventories in Theora/Ogg format as well as the usual mp4 formats. VideoPress users are now able to access the Ogg file URL from within the Media Library, and the video can be played directly on browsers that support HTML 5, such as Firefox 3.5 and Chrome. Watch this video in Firefox 3.5.
*You can embed HD-quality videos into your blog using VideoPress.