Hi i want to share my experience with you, you need to convert your dvd or video to the correct format first, ipod only support h264 and mpeg4 encoded format, i am using cucucsoft ipod suite, it works good for me, it can not only directly convert dvds to mp4, but also can convert avi, wmv,asf, xvid, rm, rmvb etc to mp4, it's easy and fast to use, highly recommended if you are looking for such a converter, i get it from
http://www.ipodtechies.com/viewtopic.php?p=49#49
, cucucsoft is the best for windows and handbrake is for mac