|> First try playing it in different Video players like "VLC Media player" or "KM Player" or "Windows classic media player".|
> You can also Try changing its format using some third Party Software. There is a wonderful application available internet called "Format Factory". Download and install it in your computer, and now convert its format to ".avi" or ".wav" or any other Video file.
After changing the format, try playing it in Windows Media Playe 11
Thank You :-)