For general education on a whole bunch of things, check out thegreatcourses.com. They’re not just single 20-minute videos, though: they’re more like well-structured courses that feel like college-level “survey” courses (like “art for math majors” or “physics for marketing majors”). Typically 24-48 half-hour sessions. Even most of the video ones are good just as audio, especially the second time through (I’ll re-listen while driving or doing yard work).
You do need to “buy” them (and they go on sale for $30-40 on occasion) but if your public library has access to the Kanopy app, many of the courses are there, too - for free.
Very good ones include the weather one (and then after that one, watch the extreme weather one), the Structures one, the Everyday Engineering one, Capitalism vs Socialism, America in the Guilded Age, the Hubble one, and the National Parks one (done w Nat Geo). Much deeper dives but absolutely fascinating ones include the Origin and Evolution of Earth and the cosmology one. There are also excellent ones on religion but one needs to have an open mind for some of the best of those (nonetheless they’re very informative).
First step would be to try to get access to Kanopy. Once that’s done, look for courses on a computer instead of an iPhone: their search engine isn’t very good for phones. Then tag ones for your “favorites”, then you can see them easier on your phone.
