Squats have started to get hard for me again, so I had my partner take a video. Apologies for the poor shot setup, I didn't take the time to get it right. the decision to record was spur of the moment. I know there is a wrist flexion thing happening. I think it might be tied however to something else I'm seeing, it looks like thoracic flexion is happening. I figured I'd get some second opinions to see if what I'm detecting is correct, and maybe anything else I'm missing here.
https://youtu.be/iis_8GQgpBw