Unfortunately it is such a repository of information that it's nearly unavoidable anymore. It's a reference tool. Need to fix your car? YouTube knows how. Need to write a piece of code with a tool you're unfamiliar with? A random Indian man has posted a YouTube video explaining how. Need to find a hidden item in a video game? YouTube. There are many and varied reasons I'd pull up a YouTube video outside of the intended purpose of "watching YouTube" for entertainment. Many of these things can, technically, be conveyed through different media but often poorly and with a much lower rate of understanding. The sheer volume of knowledge and culture lost if Google ever takes down YouTube's servers will be akin to the burning of the Library of Alexandria and that is not a joke. I don't want to "watch YouTube" anymore for the most part but it is inescapable to me for several purposes as a reference material.