I know you cant see my feet (bad camera angles) but the weight is on the heels and the outside of the feet, and the knees are tracking the toes quite well. When I squat with anything above 60kg the knees fall in, and the weight shifts to the inside of my feet and the big toes.
It feels extremely tight around the hip flexors and tensor fascia lata. Its also quite tight on the muscles that run alongside the shins.
Anyway, good constructive criticism please