Richard Feynman Explains Time Like You've Never Seen Before [video] (opens in new tab)

Strange things happen when you sit without moving.

Existence-Time by Dogen

https://en.wikipedia.org/wiki/Uji_(Being-Time)

http://thezensite.com/ZenTeachings/Dogen_Teachings/Uji.htm

These are AI deep fake videos "inspired" by Feynman, not real lectures. His books are widely available, though.