I'm a practicing physicist and I though this video was perfect. Undergrad classes were roughly a decade ago for me and I never took complex analysis. If I did this in grad school classes I don't remember and it was maybe 1 or 2 homework problems total.

I have a feeling I'll retain the ideas better than I would have with a traditional lecture. There is something about how the visuals are presented and transition into each other that really helps make things intuitive. I don't expect to use this directly anytime soon, but it's nice to keep the concepts in the back pocket.