Those squats are perfect Chobbs, I wouldn’t change a thing, save ATG for front squats, which you should be doing anyway. The depth your getting in the vid is paralle little below, this is what you want your body to lock in on, so every rep looks just like this 1000 times a month or whatever, just lock that form in, than get your extra depth, quad work on the following front squats, or hack squats.
What I’ve seen over the years is guys start monkeying with they’re form, say on different days - one day high bar - one day low bar- one day deep - one day high. It all starts to screw with they’re groove, when it comes time to do a meet or whatever. Find the perfect set-up for back squat, and lock that shit in - where the bar sits on your back, how deep you go. This is a compitetion lift, play with the form on your other lifts. This is what I’ve seen over the years anyway, let the guys that monkey around, high bar squat on Tues. low bar squat on Thurs. 1/4 squats on Sat. haha these are the guys that’ll never get to 315.
When the bar’s on your back it’s a comp. squat period, lock that shit in. I use box squats for my hip and ass work, and front squats for my quad and core work. I’ve gotten my squat back to 500 in 6mths using this method, and everyone I know that squats 500+ does the same thing. You have some perfect form going on, thats awesome, on days when you do your box squatting, play with the hight then, use a high box to handle 120% so you get used to the weight, and your comp squat will follow, and use the front squats to get your volume, and buld muscle.
Take a look at all the best raw squatter’s in the world, they all use the same formula. Sorry to ramble on, and sound agressive, but your on a really good path, and monkeying around with your comp form, will set you back. Personally I think you should park all your other lifts, and take a couple months to get that squat up over 400. Thats my 2cents