Just to claryfy little bit more.
You already know from Deerpark's link:
http://en.wikipedia.org/wiki/Pirated_movie_release_types what "screener" is.
In most cases, movies like this are playable. They may display some copyright warning screen at the beginning, or they may display a watermark throughout a movie.
Often Windows Media Player won't play movie like this one, because of copyright issues. That's why, you're getting this:
the file is not compatible with your media player
3rd party players, usually will play it, but if you're getting something like:
Please visit www.TorrentMovieSupport.com
to download the Media Player.
the file is suspicious, and should be left alone.