What can i do to make limewire music videos work on the ipod video?

ive wondered this many times. i download a music video from Limewire then i drag and drop it over to iTunes. then i synce it to the iPod video and when i try to play the music video on my ipod….it doesnt play!! do i always HAVE to buy stupid music videos from the itunes store? is there a way i can change setting to make it work??

helpp!!!

iTune only reads MP4 format file for videos.
you can try to download the one that are already is MP4, or you can convert your current video files in to MP4