While YouTube is now commonplace enough that I could see an author use it naturally without compensation, I'm sure that payment happens. How often? Most books d

While YouTube is now commonplace enough that I could see an author use it naturally without compensation, I'm sure that payment happens. How often? Most books don't sell enough copies to make it worth their while. I do know some local mystery novels who sell off the right to name a character at some of the local charity auctions for schools or other organizations. It's kind of cute.