The best video format for ipod touch is 640*480 mp4(AVC/H.264 video encode, aac audio encode) format, convert video dvd to ipod touch, you need to use a right software to convert your video dvd to ipod touch mp4 videos, then you can add the converted mp4 videos into iTunes and sync to your ipod touch. you can try Total Video Converter,it is a powerful Video to iPod converter which can fast convert video to ipod with high quality. The Videos to iPod Converter supports batch conversion and setting relative output parameters before starting to convert videos to ipod.