What's up GC? I hope you're brother is still training as well.
You're starting with the bar in the right spot, but your upper back is going soft on you and the elbows are creeping up as you descend. See the plates spinning back and forth?
Get your chest up so the upper back is in right extension and keep the elbows down. Squeezing the scaps together or thinking about putting your elbows in your back pockets may help keep them pinned in place.
Each rep go through the same routine. Lift the chest, keep the elbows in place, big breath, brace and squat.
Work on that and let us know how it goes. Good to see you're still at it.