From Sonja Foust, who manages Duke’s Central YouTube channel through the Office of News & Communications:
YouTube has rolled out a new feature called Cards. They’re a little like annotations, but they’re mobile-friendly, which is really exciting when most of us are seeing a larger and larger percentage of our traffic coming from mobile.
Here’s more info on Cards: http://youtubecreator.blogspot.com/2015/03/make-your-videos-even-more-interactive.html
And you can see one in action on our recent video, here: https://www.youtube.com/watch?v=PUh1szgP6rc