First off, these are all high. Tell your video guy he's not a good judge of depth.
Here's some things to do / work on:
1) Take the exact same stance you're taking, but bring your heels about 1.5 inches closer together. This will get your stance width correct, and your toes turned out at a proper angle. When we said 30°, we meant 30°, not 10°.
2) Once you fix your stance, jam your knees out so they track out over your toes on the way down.
3) Get your knees forward quicker / earlier in the rep, and stop them about a half inch closer to your toes (you're letting them go too far forward. Final knee position should be established 1/2-2/3 of the way down, then they don't move for the bottom of the rep - you just sit back and bend over.
4) Note the difference between the first and 4th/5th rep. You're lifting your chest on the first rep, it goes away when it gets hard because it's inefficient.
Do those things and let's see what happens. Note that you may need to drop some weight since you're 2" high on all of these.