There were other officers at the scene. The “normal” mode is for one to deal with the drunk, one to keep the crowd away. If you watch the end of the video, one guy moves in and a security / LEO pushes him away.
I would have tried a wrist lock first, moving the girl to the nearby vertical post and then proceeded with hands behind the back and cuffs.
“The drunk”
You are never going to redeem the idiocy you have spewed on this thread until you are mentally capable of comprehending that there never was a “the drunk”. There was a group of drunks and they were fighting
That is why the bar called the police rather than just having the bouncer take care of it.
Though the camera angle on the edited video doesn't show it, this drunken dingbat was just part of the herd.
But the camera didn't show the whole story and that is why things did not go well for her in court.
You seem to think that you are debating well and not looking foolish. For the whole not looking foolish idea to become at least a vague possibility you will have to learn to use plurals. “Drunks.” say it with me now “drunks.”