Windows Media Player cannot play videos with .AVI extensions

I decided to download a movie my best friend keeps on telling me about. He even gave me a link in ISO hunt where to download. I am a little bit curious in the movie as well, but to my frustration, I have waited almost five hours of download, but I cannot see the video!
I can only hear the conversations. My best friend testified that he was able to successfully watch the video from the given link. There were good comments as well on the ISO hunt page.
The file extension of the movie I have downloaded is .AVI and I am using the usual Windows Media player to watch videos, so I guess this is the reason why all my .WMV files are working.
I tried the downloaded movie on Real Player, as well on Nero Player and hate to say this, but I am really discouraged. If anyone has their decent advise, kindly comment.
