Looks a lot more like a box-squat.
There's one thing missing. You're not releasing your hip flexors.
Try this to under stand the concept.
Just at home or wherever, sit back like you would a normal box squat onto a chair or something. Once all your weight is on the chair, lift your knees up. You'll slightly rock back. Re-engage the hip flexors (pull your torso so your center of gravity is over mid-foot) and do something that feels akin to a leg curl to pop back up.
When you 'rock back', don't actively rock back and then rock forward. It's basically cheating and can lead to injury when done with a lot of weight.
I think your toes still flare way out because of inflexibility and lack of p-chain strength.
You might need to go even higher with the box squat and use less weight to be able to move your toes in.
I also see this odd thing at lockout. You want your concentric to be a seamless single movement. And make sure your torso is anchored to your pelvis the entire movement. It looks like your hips move forward at lockout, but your torso doesn't go with your hips at the same time. This is leading you to tuck your hips and can cause back problems.