The Halo Channel has been released on Xbox Live to coincide with the launch of The Master Chief Collection.
The Halo Channel replaces Halo: Waypoint, Xbox 360's ancient app for all things Halo.
The Halo Channel lets you watch all sorts of Halo videos, whether official or community-made. It's also where you can watch Halo: Nightfall, the digital series that bridges the gap between Halo 4 and Halo 5: Guardians.
The channel has a wiki for the Halo lore and will also serve as another way to launch The Master Chief Collection.
Have a look at the gamescom trailer for a quick recap.
You'll find it on the Xbox Store through Xbox One or through the SmartGlass app.