I use Google chrome as my default browser, but I DO have Firefox up-to-date, and have tried it as well...with the same results in exactly the same cases. I'm sort of thinking the problem has to do with a video codec, but I wanted the opinion of someone with more expertise than myself in such things. Needless to say, I'm stumped. Let me know if you need anymore information to help pinpoint and I'll try my very best to provide. And again, thanks for your help.