"An account of human suffering" (assuming I remember the approximate title) is one of his earlier videos that sticks out in my mind and one I'll never forget. It was a tongue-in-cheek nod to the fact board diagnostics for hardware that has obviously been abused by the end user is a tedious and often thankless process.

I learned a LOT from watching his videos, and I don't even do board repair! Psychology, business, the human condition...