This is a fundamentally good squat, Dan. Yes, it is taxing, but keep thinking about tightness. Big air, brace abs, etc.
I would like to see straighter wrists (you're flexed) and kick that habit of rocking on your feet between reps before it gets ingrained into your head, making it a harder habit to break.
Finally, I see you racking the bar on your toes just a bit. Consider trying the bar on the next lower notch in the rack to assist you. Try it next time with an empty bar to see how it feels different. You want it to be at mid sternum level if you're standing up and facing the bar in the rack.