I didn't had that problem but, was it just me or weren't there any controls on the thing? I couldn't pause it or anything. Near the end the dog decided to take a dump on the carpet and I had sit through the whole thing again after I cleaned it up.
I didn't have any of those problems, actually. The video played fine and I had controls the whole way through. FF 3.6 on an outdated Ubuntu distro here, which I would have expected to have its share of problems if normal systems did.