This is a short Orvis video on fishing what can be a complex spinner fall on a summer evening.  After a short Entomology primer it evolves into detail on what to look for, and how to fish it.

https://midcurrent.com/2019/08/25/video-hatch-how-to-fish-a-spinner-fall-introduction/?mc_cid=9afcab4473&mc_eid=9ff7f7ed4c