Actually, during my time at university, I needed a quick read-up on a subject, so I asked one of my professors. He answered: "Youtube", and when I looked surprised he said: "Don't worry, we all do that". I've even been able to recognize Hank's Crash Course in other professors Power Point. And, while we are at it, Wikipedia is about as reliable as Encyclopedia Brittanica.
Youtube contains endless piles of crap, but also huge amounts of excellent informative videos. The art is picking the right ones, but once you learn that, the information is far from simple. Yesterday I watched videos about the math behind the emergence of turbulence in laminar flows, and after that I watched Veritasiums bet with another physicist about traveling faster than the wind getting settled once and for all. I can highly recommend that one:
Source: https://youtu.be/yCsgoLc_fzI