Grip and bar position look good to me, from that angle.

When you unrack the bar, you are doing it in a split squat right now, but as weights get heavier, that puts an uneven load on your back. I try to get in a squat position when I am under the bar, unrack with both legs, and make one to two steps back to squat.

Depth: you are above parallel at the moment, meaning your hip joint is higher than your knee and your thighs are not parallel to the ground. It could be a flexibility issue or just not aiming for the right depth, but either way, try to go for a deeper squat, parallel or below.

Bar path is another thing to watch. In a good squat, the bar goes up and down in a straight line, perpendicular to the floor. That's mechanically the most efficient path. Re-watch your video and just focus on what the bar is doing, and you'll see that it travels forward quite a bit when you go down. This is for a variety of reasons, but a useful cue is to lift the chest up. Or, just visualize moving the bar up and down in a vertical path. Sometimes just focusing on that makes a difference.

HTH!

Much improved, my dear. The thing that really sticks out to me is that your movement seems to be starting in your knees, not your hips. As a result, you are not sitting back so much as bending over. I can tell that you've been working on your flexibility - keep that up so that you can hit parallel. But maybe also really focus on hinging your hips back as the first part of the movement - like you are getting ready to sit on the can .

Also, have you been adding core work in? Building that nice strong core will really help you keep your chest up and your bar path straight.

Keep up all the good work!

I see the knee/hip thing. Would some air squats/ broomhandle squats help practise this? I think is you think about pushing your butt back as the start of the movement it might help?

I wouldn't worry about whether hips or knees bend first--the thing you are doing in both of your videos (though it definitely got better since June) is changing the angle of your torso instead of using your legs. The angle of your trunk should not change throughout the squat--the point is to keep the trunk erect, and let the legs move you up and down. At the bottom of the squat, the thigh bones should be at least parallel to the floor, and ideally the hip joint is below the knees. The shin bones will often have the same angle as the trunk, but that ultimately depends on your proportions (the length of your legs in relation to your torso, the ratio of your shin length to femur length, etc.).

The key is to work towards a vertical bar path (=efficient lifting mechanics) and good depth (using your posterior chain muscles over the largest range of motion).

This thread interests me... I have the same squat issues. I fight having my knees lead and I think I have the same type of stance when I try to get up from the squat. I have deloaded and have gone back to body weight squats and now light weight box squats. I feel like I am having to work insanely hard to get the form right when I should be. I look forward to following your progress.