Are you wanting to do just the one file? If so, you can do what somerandomguy suggested. Handbrake is another well used program. I don't remember what files it supports. If you want to do many to include movies, I use Mobiola Studio. Research its file support. It is a paid purchase, but is preset for the 8900 and video is amazing. I have six full movies on my media card and they are gorgeous. I convert them and then transfer to media card with Roxio.
Phones Owned: Nokia 6200; Nokia 6126 2ea; 8700g; 8900; Carrier-Cincinnati Bell: Future Bold Owner