Paul Stamets, a legendagry mycologist and founder (A Scientist and entrepreneur that successfully founded a mushroom company that grew and grew and grew ). This talk is on psychedelic use, but there are multiple other sub-topic talks by him. Always a joy to hear about his new discoveries in mushrooms and an inspiration regardless of what you do.
https://www.youtube.com/watch?v=ZT-qQWOf98Y
You should check out all his talks if you like this one.
If you are pressed for time, check out his shorter TED prsentations (not necessarily 2020)