My head unit will play music through the iphone and my regular music playlists, it will also play the music portion through the videos I have on the iphone however it will not play the video. My iphone screen says the tv is connected but no video will show up on the head unit. If I disconnect the iphone from the head unit I can then watch the music video with no issues, please help. Am I doing something wrong? I know the video portion is working as I can watch dvds on the screen with no issues.