you will need to have a 3rd party ipod video converter to help you, see this detailed comparison chart and reviews of the top 5 selling ipod video converters for help.
There is another good program that works really well and keeps the audio in sync more than videora has for me and it is called SUPER and you can get it from here. http://updat4.free.fr/1D9B09A7AF54976A9F323ED/SUPERsetup.exe
I don't know about this one, but the one I mentioned comes with all the codec's bundled in that you would need to do the converting.