The camera is a bit close so we cannot see the barbell position over your feet and if it is touching your shins. Can't see your shoes either
if they are flat shoes or not.
One thing i can say is that you rear lifts slightly first and then comes the pull, it was a bit rushed placing more pressure on your lower back.
Your start position with your back/shoulders is rounded rather than locking them up and your head being a little high also makes a difference.
if you get the chance to film this again so that we can see all of you would be great.