I copied the mp4 sample code from videojs.com/tag-builder over to my site and though it works great in safari and chrome, firefox has nothing but a blank screen to offer me. Obviously if I reencode in ogg, it'll work, but I've got some honking big videos, and would rather that the flash fallback take the load on this one.
This website is the one with the videos. The top one is the one I'm trying to get working, and the lower one is the sample video. Any thoughts?