This is a special post for quick takes by Paul Bogdan. Only they can create top-level comments. Comments here also appear on the Quick Takes page and All Posts page.
Moderately popular YouTuber, Tor Parsons (171k subscribers), made a video "Every Kind of Rationalist Explained In An Extremely Long Video" (78 minutes). Tor is rat-ish but his channel doesn't focus on that. This video just summarizes the different rat subcultures. I found it enjoyable, and its covarage was wide enough that I learned some new things: