yea ADDZEST is the japanese version of clarion. not sure on the video in?
but if you look on the back of the unit you will see an input for a stacker cord.
im not sure, but i think kenwood make a mp3 stacker aswell...and there should be a lot mre on the market soon(if they were smart) so maybe hunt aroud a bit more, ie websites etc. i wouldnt buy sony for car audio stuff, but thats just my choice i guess