Black ops theater mode is what i use now days. But before that for cod4 and mw2 i had to record every single game i played. With those cod4 clips, that is PC gameplay. I basically use /record "namehere" to record a demo with the tilde "`" key, then use cod4player to play it back.
i need a movie.cfg file to get rid of the text and stuff other than the kill feed.
and theater mode isnt the kindest to me, one of my most memorable clips didnt save cause the host rage quit. I assume he didnt want to be in a montage. I got a single m16 kill, a double, then a QUUUADDD, then from that i merked the whole team with a rolling thunder i got from the rape. Then the host left.