Sky Watch

New Theme, with No Change

Not exactly... There are some visible changes. I rewrote the theme of this blog using HTML 5 and CSS 3. Everything seems fine. But can someone please tell me why the following video does not work? (At least not in my Firefox 3.5.)

I tested this theme on Chrome under Windoze, and the video was normal. I don't know what is wrong with my Firefox because it can play many other videos without problem.