Derek from UNEASYsilence has an easy to implement tip that will help you download music videos from the iTunes music store.
I stumbled upon a very useful PHP script which allows you to download complete music videos from iTunes. You have the option of downloading the smaller or larger .MOV format videos which can be imported into your personal iTunes library.
He's taken the trouble of setting the PHP script up so you don't have to. Just read the tutorial and follow the instructions.
How-To: Download music videos from iTunes [UNEASYsilence]