Watching the video back really not happy with my 200kg pull, was clearly too heavy for me. I'm going to take the weight back some and work on getting things right.
ice, feel free to rip it apart
I can see the classic arse up and lower back/glutes take over. Pretty weak position to lift.
It's far from horrible, pretty good for a weight near your max.
Hips come up as you say, loading your back (will naturally happen more with bigger weight)
Spine doesn't start neutral (look at upper back)
Glutes could be stronger
Load ordering is off (I think you know of the videos from Mwod I'm referencing)
Chest isn't "up" or through
Lats aren't on, scaps aren't pinched (or don't seem to be)
As a slightly different angle of tinkering, I think you need to find more mobility in your thoracic spine. Loads of rolling upper back with your arms overhead/hugged across body and extend your t-spine over the roller keeping belly tight. Remember that you're mobilising, so take your time and work on different segments to ease into more ROM, and keep other areas of your spine neutral! Then go after your lats with a foam roller (this sucks), and absolutely hammer your pecs and anterior shoulder with a lacrosse ball.
You seem to have slight kyphosis, which should be tackled by the stuff above. Try some of the hamstring stretches in the mobility thread as this will help with load ordering. Pull throughs should also help you learn to engage your glutes and hammies.
Just watched again and you do squeeze your lats just before you lift, but it isn't enough to pull you into better position (t-spine stuff will help). Remember that with correct load ordering your back should be organised first, because when you try to pull yourself back into good positioning with the bar in your hands you end up with compromises that are significantly weaker.