Re: To sum this whole category up
How about this scenario which happens at times, someone asks a basic question in their own words and in the responses they get they learn a bit of nomenclature to help define their YouTube search better.
For example; someone doesn't know what a tailing loop is and how it is defined but knows that their leader ends up with little knots all over it and asks why. They will probably see the words tailing loop in a response and so go to YouTube with that in mind.
Personally, I wouldn't look down on any means to learn except maybe from a well intentioned friend who can't cast or teach himself. That could actually set you back quite a bit, especially if you spend a lot of time practicing the poor principals you learned. Get good, hands-on instruction from the start then you'll hopefully know good from bad and will spend time on productive practice.