XVID? Odd format there (to me anyways). Just out of curiosity, what did you use to get that file extension?
If Windows Movie Maker (I know it's a pain, but it might work) can open that file, then you can save it as an MPEG... But I don't think it will. Try a few Google searches; I bet there's probably something out there that will get the job done.
Hope that helps.
-Jamxx