The one you got looked at least a little bit high. Actively try to push your knees out the whole time and I think that will help with depth.
It doesn't look like your getting much hip/glute/ham drive in the bottom. It looks like you might be tracking your knees over your toes. If that's true (or close to true), you might need to sit back further.
For what I just said, I recommend box and/or pause squats.
Are you pushing your head into your bar? Try it if not.