Greetings. This is not the most advantageous angle for a form check. Please read this so that we can provide you the most optimal feedback: STICKY
However, it is clear that the bar is too high, the bar is forward of the mid foot the entire lift, and that you need to sit back more. Push your hips back and knees out. Try to keep the bar over the middle of your foot the entire lift. You also need to flex your abs like someone was about to gut punch you.
I assume the bar not being over mid foot during the set probably accounts for low back pain I'm experiencing when doing the lift?
Coupled with the low back flexion you exhibit in the video, yes.
I try push my knees out until they're over my toes and at the same time push my hips back and then descend but the bar doesn't seem to travel in a straight line over mid foot. Don't know how to rectify this. If I actively try keep chest up at the bottom would this help maintain a flat back? Thanks for all your help!