If optics and photolithography interest you I recommend Huygens Optics on YT [0]. Jeroen, the creator, has an engrossing passion for the material.

Jeri's process [1] is wild compared to Sam's lab.

[0] https://www.youtube.com/@HuygensOptics

[1] https://www.youtube.com/watch?v=PdcKwOo7dmM