Squat form check

[Mirat]

100kgx5

[Mirat]

Can I get any feedback ?

[Brian Sloan]

I love the enthusiasm with the bar speed, but it's messing up some very important fundamentals; slow down and try to be more tight and controlled. The speed will come eventually. I promise. Reach back with your butt a little more, and point your chest at the ground sooner in the descent. Stay with your hips a little longer on the way up.

[Mirat]

What do you mean by "stay with your hips" ?

[Mark Rippetoe]

Hip Drive | Mark Rippetoe

Correcting Squat Back Angle | Mark Rippetoe

Squat Mechanics | Mark Rippetoe

[Mirat]

Hip Drive | Mark Rippetoe

Correcting Squat Back Angle | Mark Rippetoe

Squat Mechanics | Mark Rippetoe

Thanks.
I was already aware that the back should not be vertical, does it look not horizontal enough in the video ?
I'm trying my hardest to sit back and am thinking about hip drive in the bottom, but maybe i'm failing to do so.