Perdón por enviarlo en inglés, pero no tengo tiempo de traducirlo. Igualmente sólo puede probarse con las versiones de pruebas diarias (nightly). Theora video backend for Firefox landed It was announced at the Mozilla Summit that Firefox will include native Theora and Vorbis support for the HTML 5 media elements. Chris Double writes, "The backend has been committed to the main Mozilla source code and is enabled by default. You can download nightly builds and test it out. An example of a live site that uses video is the Wikimedia video archive. This original commit is a work in progress. There are unimplemented bits, bugs, etc that need to be sorted out. But it's a start towards using a common codec across all platforms and will improve as we get towards the 3.1 release."