This specific incident was a bizarre anomaly. It doesn’t mean that police procedure and law regarding DUI enforcement doesn’t work and needs to be revamped. Maybe it’s not perfect, but it is the way it is, probably to err on the side of safety even if it’s after the fact where no diving was observed.
for those saying it’s better to let him sleep it off or let him uber home etc. I personally wouldn’t mind that IF I was not liable for anything that happens to him afterwards. As it stands the department can get sued and officers can get in trouble if he hurts himself or others due to his intoxication.
It doesn't really seem like it is an anomaly. You can kind of understand why all of them reacted the way they did.
He should have been arrested imo based on reports of what happened before the filming started but you shouldn't be liable if he was let off with a warning. Liability is probably another unhelpful societal quirk that should be looked at.