A few questions? Can you play video through the factory Nav system and can you use an external hard drive to store video and music ( ipod video or touch or small hard drive) and can that be controlled trough the steering wheel? I want to know what is the best route to do this, I’m sure others have the same question. Basically I want something to play music, video and do navigation and I want to work with steering wheel and look factory. Just trying to find the path of least resistance.