Why cant I play a movie in avi format?

Alright so I have movies downloaded to my computer, they are in AVI file format, they don't play in the DVD player if I burn ...

How do you convert a file that is saved in Windows Movie Maker to a Windows Media Player format??? It won't play in Windows M...

why ., I cant play youtube videos on opera ? it says : Hello, you either have JavaScript turned off or an old version of Ado...

it has the ability but it says tht i dont have any vids after constantly downlaoding them!

How can you play movies off a laptop? with vista

how can I play AVI files...whenever I try to play them on windows media player it says xvidcore.dll not found

I have a bunch of movies that are on my laptop but they don't play on my ipod (touch 2nd gen). How can I convert them into so...

I downloaded a couple of movies from Limewire with and ending of avi, but when I tried to put them in my IPod it gives the me...

I just downloaded mov video file and to be honest I have no idea what kind of format this is. Can anyone tell me to which for...

The time count is going but the actual picture and sound aren't playing.