'twas ever thus, except in the old days you had to go to a library and borrow a book on specialist subjects if you wanted more detail and accuracy than TV could offer -- always assuming the library had one (they often didn't) or could get one in on inter-library loan (they often couldn't)... 😞
If you can sort the gold from the dross, there's a *huge* amount of good material out there nowadays -- videos and reading -- on almost anything you can think of, no matter how obscure or specialised -- and it's much easier to access this material than it used to be, thanks to the internet.
Unfortunately there's also a massive swamp of complete cr*p -- which often looks the slickest! -- posted by people who either don't understand what they're talking about or are being deliberately misleading to promote their own interests... 😞