Lie detection for chess

I asked in post one... a few questions. I was not trying to point the finger on any GM's and the answer is probably a ceiling camera would not be good enough. I cannot imagine lower rating players being filmed for posterity, that's why i used the GM level. They get videos done on them. Maybe chess sites might like to use something like webgazer for important rated chess tournaments. The video was interesting. I did not test it out, because my old pc does not have a webcam. WebGazer.js https://webgazer.cs.brown.edu/ The demo link ... https://webgazer.cs.brown.edu/calibration.html? This concludes my post 1 main question.