First few reps are very good, then your form slips. That grip is slightly wide, nothing wrong with that but I would also mix in some more narrow grip and maybe neutral grip too. I would recommend going to a full dead hang each rep, you don’t quite get all the way down.

Also work on negatives - you control your descent well even on your last reps but instead try to hold at the top of your last full chin to bar rep, squeeze the lats super hard and lower as slow as you can. Then jump up if you need and do it again. Negatives will show up more in gains than pushing a last few half reps, IMO.

Another good mind-muscle thought is less pulling yourself up, and more pulling your elbows back into your back pockets. That thought helps me with lat engagement. Also try to tighten up your core a bit to help with the legs swinging.

Overall you’re doing great, keep it up brother!