I recently bought a Honda civic reborn with navigation option. It supports a SD card storage too so I have a 16gb SD card which I filled it with music and it played perfectly on the system. But I want to put movies in it also. I put a video mp4 format from my mobile on the memory card and it played perfectly but I when I downloaded a video from YouTube in mp4 format it didn't play. I could hear the sound but no video appeared on the screen. Can anyone help me out and tell which formats are fully compatable. And btw it can also play DVDs.