What exactly are you trying to accomplish?
1) If you are looking for samples so that you can see what movies look like on the screen, use my previous suggestion of the Apple trailers website.
2) If you have DVDs and want to convert them to play on your iPod, then download the Handbrake program and use it.
3) If you are looking for links to sites where you can download free copies of commercial movies, this is illegal and it is NOT appropriate to solicit this kind of information on this website.