Hey guys Toma here,
I was playing gpp and I tried to make a vid. So I did the /record command then ended with /stoprecord.
I click the video and Windows Media Player won't play it because its dm.70 please help.
That is a demo file, not a video. You can play it back in tremulous by typing /demo something.dm70 in the console.
/record and /stoprecord are for making a demo.
/video and /stopvideo are for making a movie file (I think .avi) while you are playing back the demo you recorded.