SOPP672: I’ve noticed that playing from a tablet, the pages seem to turn by themselves

This question was sent by Gerrit, or, I don’t know how to pronounce it.  If he’s Dutch, maybe “Herrit.”  I would appreciate people maybe giving us feedback how to pronounce their names, right?  Would be nice.  So Gerrit writes:

I’ve watched and listened to your performance of Duetto, Op. 156 No. 6 of Joseph Rheinberger. Thank you for that. It sounds beautiful.

I have a question, maybe somewhat off topic, but I’ve noticed that playing from a tablet, the pages seem to turn by themselves. For example at 1:04. How did you do that? I am working with MobileSheets with the auto-scroll function, but your method is better.
Did you turn the pages by yourself or was it another person?
Hope that you can clarify this mystery for me.