[quote]Anthony Mychal wrote:
Your t-spine position is fine. It’s just that you’re leaned over, which is a consequence of shoving your hips so far back.[/quote]
This is true. I meant that suggestion less as advice on your form and more as a weak point that you should address with work. The bigger and stronger your upper back is the easier it will be to stay upright in the squat. Sorry for the confusion and poor wording, it was a long day. Your back is straight in the video, you are simply too leaned forward.[/quote]
Yeah the issue is sitting back. You can see from the side view that the knees barely move forward at all during the squat. This is great for the knees, but not so good for the back.
Deep knee bend = knee stress
No knee bend = back stress
I think the olympic lifters strike a good balance here. There is some knee bend but the back is held upright.
OP you asked how to get more upright - do olympic style squats (narrow feet position, toes forward, knees spread out - and most importantly and higher bar position, resting on top of your traps - hips cvoming up and down almost vertically, no sitting back!) At least for a little while it could help. It might make your P/Ling style squat better.
Although as has been said, your squat is not bad. And looking at your body you seem to getting good results from it.