Adding to my last post....
It seems that if you want to watch video from your ipod to the pioneer avhp4300 you need the pioneer cable. The Requirement seems to be the 3.5mm 4post plug. if you put a 3 post one it doesnt show video (the 4 post one is for remote control that the apple gadgets use (mic,<>, pause, etc) I am not sure why but that is needed
On the motionx side. I can get sound from it but the video doesnt move to the HU and therefore not what I am looking for.
Hope some one can find the answer.
mas