how or what do i need to play copied dvds on my pc?
a dvd-rom/rw drive… and the relevant software
Well, haveacigar is correct, and concise, but if you want another clue, look for a media player called VLC. It is free and will play dvds on your computer in several different operating systems—provided you have a dvd drive of some sort.
VLC lags and its not that good. If you have Window Media Player (preperably 11) install the CCCP codec and you can play almost every single file and no skips and crap like that.