This is a follow-up to Video, Mobile, and the Open Web. As promised there, OS-based H.264 support for the HTML5 <video> element has already landed in Gecko, and it just released this week in Firefox Beta for Android. Firefox OS (B2G to the early adopters!) also supports H.264 from the HTML5 <video> element. The challenge remains working through OS decoders on the various desktop OSes. Here’s where