I have never seen this mentioned, anywhere in this entire investigation, and to be fair, it's probably not even relevant, but I wanted to share something with respect to the POI video, specifically this subject's posture. I myself grew up with a spinal deformity called Scheuermann's disease; it's basically structural kyphosis of the spine - a hunchback posture. It really sucked and caused me a lot of pain. But years later I had it surgically corrected at the HSS in NYC and now my spine is perfect, not to mention I hit the gym heavy 4-5 times a week with no pain.
Back to the point, though, when I first saw that POI screenshot, I immediately noticed this person's posture. It's like a 6th sense I have after dealing with the truly sucky situation of a spinal deformity in my teen years, back braces, pain, and ultimately surgery! I am hyper aware of it. And I simply think it is notable. Many people (especially young people) these days do definitely slump in their posture, but there is something very much beyond just poor posture, at least from what I see. Of course, the camera quality is total crap, and I am sure the lens distortion is horrendous, so in a sense, any relative angles are probably really skewed/warped/distorted way out of proportion. But, nevertheless, it's something I have never seen people really talk about. I am very convinced this person had some kyphotic deformity, or at the very least, a pretty moderate or greater level of scoliosis.