5 3.6 11 10 9 4 2.1
Modern browsers all support HTML5
video, but do so with different video formats.
Firefox, Chrome, Android and Opera support ogg/theora (.ogv).
IE9, Safari, Chrome, Android and iOS support MPEG4/h.264 (.mp4).
Firefox 4+, Chrome, Opera, and Android (2.3+) support WebM/VP8 (.webm), as does IE9 if the required codecs are installed on the system.