From Apple’s “What’s On Apple TV” page:

With Red Bull TV, the worlds of action sports, adventure, and music collide. Get access to live and exclusive events featuring the world’s greatest athletes, artists, and more. You’ll also find full seasons of original series like Momentum and 21 Days, in addition to an extensive library of videos on demand.

Apple keeps the new content coming. I just wish there was a new way to browse all of this content on the Apple TV — it’s annoying to have to check three or four different apps to try and find something to watch.