YouTube's Follow Back in Google+

Emanuele Bartolomucci spotted a new YouTube feature: when you're watching a video from a channel associated with a page that follows you in Google+, you get this message: "X added you on Google+. Follow back for exclusive updates!"

I wasn't able to trigger this feature, so it's probably an experiment. It's also a sign that YouTube will integrate more with Google+.

{ Thanks, Emanuele. }