That reminds me on Lee Si Chen, a great Electrical Engineer (IEEE level) but a fringe science supporter. Yes, a bit like Will Beaty and in its infamous web from the 90's, but he put all of these theories under a section "just in case some cracknut it's right".
Back to Si Chen, here you have:
- Paper about finger reading
https://ijhc.org/wp-content/uploads/2022/07/SCLee-2-2.pdf
- Video explanation
https://www.youtube.com/watch?v=HZ9g1CM5m8Q