First obvious things.
1. Each rep needs to be reset for a deadlift.
I understand that, but thats OK.
2. Looks like you're doing rack pulls?
well...kinda..but plate only a couple of inches from ground. Last 5 weeks ive been doing from deck in commercial gym...so no biggee. I need to get a couple of rubber plates for home to save the floor, or a thicker matting section area Have actually found it easier lately from the ground for some reason.
3. Ditching the trainers was a good move, you don't need an unstable base.
agree..felt that one myself
4. Your first pull, (actual rep) you're lower back isn't flat.
Good point, i seee that now. Just got to try and fix it now.
5. Looks like your stance may be too wide.
another god point, was struggling a bit with a narrower stance for weeks, so have deliberatly widened a little which feels like I have more room to move without knees getting in the way. What is best position for this..shoulders wide? I see yours above...quite narrow stance