It's funny to go back to this thread. I quit my " Authortube" channel.
It sounds silly, but the fact is that those channels get very few views, and I don't think they'll help sell books.
I participate in another YT channel on pop culture, and the least popular videos get 1000 views. When we record a topic we know is not very popular, say "nobody will watch it", meaning 1k views... But for authortube, few channels reach 1000 views/video. So if you want to do it, you have to do it cause you really like it. I do like it, but I can only do a certain amount of things per day, and I need the time to write... I came to the conclusion it was not worth it.
That said, I'll keep my channel just to talk about my books, and I'll have videos to go with book launches (I'm projecting some 50 views
). I'll see if it does anything. Maybe it doesn't.
I wrote before that Youtube is like indie publishing. If you put quality content consistently, your channel grows. That said, it's also like indie publishing in the sense that you need to write/youtube to market. Authortube is not a good market. Booktube could be good, though, but you need to review books.