While everyone is involved, the site serves web developers. So the best practice for developing for the platform at large is the target. http://docs.webplatform

While everyone is involved, the site serves web developers. So the best practice for developing for the platform at large is the target. http://docs.webplatform.org/wiki/WPD:Policy/Pillars http://docs.webplatform.org/wiki/WPD:Policy/Pillars outlines a bit more of the thinking behind the priorities. In the case of <video>, the site will recommend encoding to both Theora and H.264, and serving both sources, yes. It's the practical (although not necessarily convenient) answer.