How To Play A Undf File Problem With Playing The Video Format 'undf'?

Problem with playing the video format 'undf'? - how to play a undf file

I downloaded a movie, and when I tried to play the movie in VLC can not read the message, the format of the UNDP. when I tried Windows Media Player on your message, which appears to play in Windows Media Player and open a window with some ..... URL tbptrack something. Can someone tell me how to read this file?