10:22:51 - Tries to pull away from the officer holding her.
you must be watching another clip to the one in the op? the one I've seen there is was a little shrug ,certainly nothing the officers holding her couldn't handle I'm sure
10:44:30 - Obviously can't tell what's going on but if she was just stood there behaving herself would the Sergeant have jumped up from his desk without reason? Would another officer have appeared from the door next to her?
What's her age and sex got to do with it? Should she be treated any differently to a 20 year old man? No.
She could have been saying or doing anything but that doesn't give any officer the right to assault her, even if (hypothetically) she had assaulted him first
Any other person shouldn't be treated like she was, the physical stuff that is