Registration likely is in glove box, but no one keeps their license there.
People will have it in their wallet which for man will mean it is in a pocket.
Indeed, but after reaching for the pocket, the cop would have given an instruction to halt, which if the guy hasn't obeyed immediately has resulted in the cop shatting himself.
That's what we have to assume anyway, as it doesn't look like procedure wasn't followed - just that it went wrong at some point during it. Because all we see is an emotive video of after the incident, there's no way of knowing, but my instinct is that the guy wasn't executed for nothing given the reaction of the copper, who sounds distraught.