The footage is shocking but it doesn't change anything for me.
The perpetrator has been tasered and is on the floor (no longer a threat). The officer stands up and pulls his taser ready to discharge but clearly realises this isn't necessary as the person is no longer a threat. Despite this, 6 seconds after getting to his feet and realising there is no threat, he kicks him in the head and stomps on his head.
This is an act of violent revenge, not reasonable force. The perpetrator is already detained. We should expect professionalism from our police officers, especially ones wandering around with firearms.
I'm not saying there is never a circumstance where that would be reasonable or proportionate, but it simply wasn't necessary then.
I also think it was intentional for the police to confirm right from the outset that it was a female officer that suffered a broken nose.
In their initial statement, they don't refer to the sex of any of the officers, except for that bit. They knew that the public would have more sympathy to the situation if it was a female officer that was assaulted as opposed to a man.
The female officers that were assaulted are the only true victims in this situation. The man who had his head kicked and stamped on is both a perpetrator and a victim. I hope he is suitably punished.
The police officer who unnecessarily assaulted someone is not safe to police our streets and should also be charged and tried fairly.