I assumed it was a <video/> element that Firefox wouldn't render because it used H.264 video, but no... it's an ordinary Flash video. How odd.

I use Firefox 3.6 on Win7 and I don't have a Flash plug-in installed. When navigating to one of the pages that contains video, FF prompts me to open or save a h.264 file with a .mp4 extension.

Give it a second and it replaces it with a javascript site.

I have click to flash set up and before I could click, it replaced.