There is nothing wrong with your form. If you pause that vid when you hit parallel, your body position looks perfect.
Your problem is that your trying to squat really low with a stance width that won’t allow it. Full squat stance is much narrower than PL squat stance. In addition to that, I’m not sure your posterior chain flexibility will let you go that low without rounding your back anyway.
You look to be about my height. Try this: Set up a box or a bungee cord (or anything really) that’s about 14" high. Squat until your ass barely touches it, then drive out of the hole. Video it again and look at the difference.
cheers for the input. ill try narrowing my stance and see what it does to my back, and also try my wider stance but only hitting parallel.
EDITED IN: i just tried my usual stance squat in my room with a webcam to check form, only going to parallel and not as low as i did in the video, and things look alot better. im still going to start and work through the 3rd world squat article notes, because i think it will be a good goal to achieve.
appreciate all the help provided!