HTML5 video tag, Ogg Theora & H.264
Download Video: Highest Quality “AVI” (FFmpeg) | High Quality “MP4” (H.264) | Low Quality “OGV” (Ogg Theora)
Using Video for Everyone to use HTML5's video tag and embed Ogg Theora/Ogg Vorbis OGV files natively, or H.264/AAC MP4 files with plugins, or worst case fall back to Flash players.