NB: VIsual capture for soundtrack demo

[Yummay]

Hi everyone.

This is my first post here. I'm a stage / audio technician as well as a musician and I am trying to find gigs in the multimedia industry.

I would like to produce a demo soundtrack of my work coupled with actual "gaming capture" of myself playing anything (warcraft, etc...)

I would like to capture visual gaming events in order to re-do the soundtrack myself. Since there is no selling involved, I guess there is no problem in doing so...

My question: Could anybody recommend some kind of screen capture for me tu use? It has to be able to capture animated events on my screen, of course...

Newbie question, I know... but the capture apps i've found so far seems to be only capturing still images or screen events within windows,not within a given game...

Thanks a lot!