Help With NZB files

I have downloaded several video clips recently only to find that they are NZB format, nothing I have got will play them, any one know what player I need to play these clips please.
Many Thanks

A NZB file is a newsgroup binary data file including text and headers.
It may or may not have the complete file (depending in how many pieces the file was archived)

Use Newsleecher or NewsReactor to get more info and extract the necessary data.