He fights them handcuffing him...that's how he escapes.He appeared to comply and was lying on the ground
He was not fighting back
Do you justify holding him up handcuffed so that another cop can punch him in the face?
You don't argue your case with the police.
If they assaulted him while he was cuffed that is another matter, but I didn't see that. Please give me the time stamp where that happened.