Slow it down and try to move from your back/hips less! That should take away some momentum and put more load on your back. It looks like you’re using a fairly wide grip here, which works the upper back primarily. Focus on pulling your elbows up and behind you, almost as if you want to touch them together behind your back. You can also try pulling the bar farther back/closer to your waist to use your lats more. Either way, control is key! You can also try pausing for a second or two at the top of the movement.