There's no reason that in a 'fair' fight that the police officer in the vid would lose, since the guy wasn't honestly that much bigger. But it was an assault, not a fight. Short of being a mindreader, most people would've been overrun easily by that attack. So dragging in that she's a woman is honestly straight up sexist for this occasion. It's not a worse crime, it's the same crime as assaulting anyone of the same size in the same way.
However, assaulting a police officer should pose an outstanding penalty. That much is natural, if only to enforce the idea of police being intimidating. But 60 years? That's extremely excessive if it's just for the attack.