Your breathing is a bit inconsistent as you start the reps. Be careful to not pull your chest up/hyper extend your back too much. Think of bracing your abs for a punch. You are still resisting the lean over a fair bit in these reps. Your head is also bobbing up and down instead of staying down with gaze fixed on a place on the ground. It might be easier if you faced the other way so you can set your gaze on something several feet in front of you. To help with the lean you could do some paused empty bar or light warm-up sets in the bottom to get a feel for that balanced position. Note also you have some knee cave in the bottom and the paused sets can also help you get a feel for what knees out should feel like there.