A couple that I haven’t seen yet: Foolish Baseball for a zillenial take on baseball, Hagerty, Throttle House and savagegeese for quality car YouTube and Scott Manley, BPS Space and Vintage Space for some good rocket science and history, and languagejones and Dr. Geoff Lindsey for linguistics.
Or they answer in BTUs. But ask them which BTU they’re using, and they won’t know.