Today, YouTube rolls out a redesign to its iOS and Android app that totally overhauls the homepage. Rather than a bunch of videos grouped by channel or topic, you’ll see a single feed of recommended videos. They fit one or two at a time on the screen, with big images and only a little information. Aesthetically, it’s cleaner and more visual in a way that suits YouTube. Far more interesting, and important, is where those recommended videos are coming from.