I don't care about the video... the cable attachment is more important for me because it allows charging.
If you're doing BT streaming of music, especially if are listening to a streaming service like Pandora, you battery will get zapped fast. Better to have Lightning cable transmitting the audio (vs. BT) and providing power at the same time.
2016 M3 - current
2013 ActiveHybrid 3 - sold
2012 M3 coupe - sold