You might have downloaded Avatar episodes from the internet to use for constructive, show-promoting activities such as fanvid-making, or perhaps the episode isn't out on DVD yet. Whatever the purpose, when you play the episode nothing shows up!

This can be fixed very easily. :] You need something called a codec. A codec is a program that lets you play compressed videos (I think).

Download this: DivX. If it STILL doesn't work, get this one: ffdshow. Problem solved!