Is it possible to upload Halo 3 videos onto your computer without having to buy

[rjlupin2]

capture card, etc etc? I have a Mac and would really like to get into Machinima making but I have no money nor do I have a regular job.

Please help me, my creativeness is dyeing to be released!
SIDE NOTE:

I also should ask if anyone knows of a good voice over program for Macs that works with (preferred) iMovies, that is if I can do this anyway?

 

[Dere Fonzie]

I believe that some DVD players allow you to record AV channels etc, so prehaps you could record your gameplay on a DVD and then edit the footage on your mac.