Scott Manley is someone who fell into youtube because he felt a deep compelling need to teach people orbital mechanics and rocket science so they could play Kerbal Space Program, now, years later the gaming videos are less important and the pure science is the main thrust. My degrees are all in Physics and Astronomy, so much of the rocket science and engineering I've learned is self taught, always learning, always teaching.
I'm not a professional youtuber, I have a day job in software development which means I won't take lame sponsored content, or tell you to sign up for affiliate services to make a quick buck. However lots of generous people have asked to support my hobby via Patreon and I'm grateful to those individuals.
Also occasionally shares cute videos of his kids.