I posted here about 4 months ago regarding my squat form: https://forums.t-nation.com/t/a-bad-combination-of-caving-knees-and-hip-shift/227140/7
I was having really bad knee collapse and had tourble hitting depth. My tempo was off and I was extremely off balance during the entire movement. You can see that here: Knee Collapse
My approach was rather simple. I took a lot of the weight off, to a point where it was a bit embarrassing to squat at the gym. I powered through that phase and ate a lot more during it. I still am eating significantly more than I was before and am 20 pounds heavier than the video I just linked.
Here I am 4 months later: Squat Progress
For context, in that video, I am squatting the same weight as the first video I posted. I actually do 1 repetition more in this second video.
Along with eating more, I started using the hip abductor machine most gyms have. I would really appreciate any feedback before I start adding more weight to the bar this time around.