It definitely would be easier to make a better critique if filmed from another angle, with feet visible.
Things I can't tell:
- Is the weight on your trapezius or your deltoid? It should be on your deltoid, which both better grips the bar to your back and promotes chest elevation, which is the aim.
- Are your feet aligned properly?
Things I can tell:
- You've got good depth, and your back appears to be in a pretty natural position (This is good), but towards the bottom, your butt tucks under slightly. Your erector spinae seems to be resisting this, but it is a sign that you need to stretch hamstrings and glutes.