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