I think it is some kind of mp4 file. The only player that will play it on my computer is the VLC player.
I can advise everyone to install this player. If everything els can't play it, this player will play it for sure.
Quicktime will also play this file type. Also try downloading and running GSpot http://www.videohelp.com/tools/GSpot .It will analyze any video file and tell you what codec you need to play it.