put a tape in and hit the manual record button so it will record the display on tv i did it once itll be hell to edit though
you will need to have a dvd combo that records dvds to edit it you will need to copy the vcr tape to dvd then rip it to the pc just to edit way to much work imo
the easiest way would be to have a built in VCR to your tv (look on ebay)
if you have one, plug in your ps3 AV cables to your tv, then shove a big black... blank vhs into your vhs player then press "Record"
and start playing your game on the screen. once your done, press "Record" again. then find a way to put it on your computer