regardless of whether or not you agree with this evan person's take here (i do and don't. i will say, if she planned on not getting shot, stabbing a cop in the face was a bad move, not that i care about the cop, just that if she planned to keep her life) no one is even pointing out how all of this is only what THIS "body cam actually reveals", out of the thousands you can go look at of cops unjustly shooting unarmed black and brown people, this one time someone might have provoked no other option they act like this is every case when it's definitely in the tiniest minority of cases.
So weirdly I tried to find some actual stats on police disarming knife weilding suspects in the UK but it's just bringing up articles comparing incidents of UK police disarming knife weilders to incidents of US police shooting them.
https://www.huffingtonpost.co.uk/entry/london-police-knife-wielding-suspect_n_56636dc5e4b08e945fefcacd
https://www.youtube.com/watch?v=J9TFvh6Xps4
https://www.bbc.co.uk/news/world-us-canada-41314562
https://www.rt.com/usa/311340-video-police-brutality-uk/
Generally, if someone's getting killed by cops here it's a racism thing, it's not their default response to stimuli.
I found a YouTube link in your comment. Here are links to the same video on alternative frontends that protect your privacy: