He walked away from the police to his car and dropped his right hand to waist level when he reached the door.

No person trained in use of force is going to let someone who is not complying with police orders to potentially access a weapon in a vehicle or on their person. 

The shooting itself may or may not be justified by the totality of the circumstances but it is a deliberate and incindiary misrepresentation of the video evidence to claim he was "surrendering" or "compliant" or "just being black."