That goes without saying...
However, speaking generally - even if you are not legally obliged - a cop telling you to get out of the car doesn't seem unreasonable. Nothing about this incident or any other incident I have seen on footage justified a weapon being undrawn. But were we to analyse some of these videos and try to pinpoint moments that led up to the flashpoint, behaviour that can be construed as antagonistic or passive aggressive should be at least acknowledged.
Any cop can be a potential trigger happy, hot head. You can't give them any reason to get irritated, especially as a black man. If they tell you to get out of the car, or put out a cigarette, you respond with: "Yes, sir". Don't give them a reason.