Daring Fireball: Creating Ogg Theora Files on Mac OS X With ffmpeg2theora – John Gruber points out that this step is necessary, since:
To use the HTML 5 <video> tag in Firefox 3.5, you need video files encoded in the Ogg Theora format. Apple doesn’t support this format at all, so you can’t just export Ogg files from QuickTime like you can with H.264/MPEG-4.
… and …
ffmpeg2theora is the one tool I found that simply just works for transcoding to Ogg Theora.
camen design · Video for Everybody!:
Video for Everybody is very simply a chunk of HTML code that embeds a video into a website using the HTML5 <
video>element which offers native playback in Firefox 3.5 and Safari 3 & 4.
Great reading for web developers who want to learn more about implementing embedded footage that takes advantage of the browser’s native video support.
Whoops, not so fast. The only video format Firefox 3.5 supports for use with the
<video>tag is Ogg, which almost no one uses. And so it can’t play H.264 MP4 files like the one in YouTube’s HTML 5 demo page.