It was ffdshow, I think.
I already had it installed, and when I uninstalled Divx it was still happening, so I uninstalled ffdshow, and it worked. I still had DirectShow installed, so now it works all good, yay.
EDIT: But now the videos aren't playing as good. D:
Maybe it was just that version I had. *gets new*
EDIT AGAIN: Yes, it was. Fantastic.![]()