Yeah. The same thing has happened in the music world, the book world, and even the movie world.

YouTube lowered the barrier to entry to basically nothing if you want to publish your own movie. Getting millions of people to watch it, even completely for free, is very difficult. Almost all of the videos out there with millions of views were published by people who were already well known (even if they grew their fanbase directly on YouTube).

Music is probably fairly similar to movies in that you can publish easy on YouTube and then direct everyone to your Bandcamp site to buy music from you.

The book world is probably hardest to crack. There are so many authors out there and it’s very easy (from a technical standpoint) to publish your own book. Writing a book a lot of people want to read and getting people to read it is a totally different matter!