https://www.zerohedge.com/political...george-floyd-struggling-cops-inside-squad-car
You can’t see what is happening inside the squad car from this video, but you can tell by the cops’ reactions that something is going on in there.
FYI, even if he was resisting arrest initially (which is not definitive one way or the other from this video), I still think the cops used excessive force in pinning him down that long and in that way once he was outside the car and incapacitated on the ground. But the original comment was about having justification for using force to subdue him initially, and this video at the very least shows it was possible that they had a reasonable cause to forcefully subdue him initially.