That bar is way too low for that stance I think, that's why your knees track too far forward and you literally, mechanically, can't go any lower, you have no room. If you look at the vid when you're in the hole, picture your body staying exactly where it is, but your feet and tibias shifting out, that's essentially what you want to do.
You can either put the bar higher or switch to high bar
Get a wider stance and sit back more.
I would suggest the latter because either way you have to make your hips more efficient when squatting. From my experience, hip mobility is EVERYTHING in any sport, once you open your hips up you're like Superman.
I would suggest box squats with a stance a bit wider than what's in the video, just to learn to sit back. Keep doing mobility drills everyday and get wider as you go along. That's not to say you have to transition to a full on Louie Simmon's squat, but you have to have a very good balance between hips and quads.
Also notice that your heels are elevating at the bottom, learn how to drive through the heel, I would even recommend you do box squats with your toes off the floor (not heavy obviously) or maybe even try squatting in flat shoes.