I think it's a DivX problem. from the second site:
Guest
This is a super simple fix. I just went through the same problem. all you have to do is download the divx codec. go to divx.com and download the divx codec. its free and will allow you to work. good luck guys
and
I downloaded DivX (free version) and installed it after experiencing the no video problem with .avi files and it solved it.
(gem) Træt af at skulle klikke dig igennem 2-3 side for at komme til den samme side. Betalende medlemmer kan tilføje det til deres kontekst menu. (pauloaguia) (vis alle tips)