As first reported by 9to5Mac, a new 'Apple Events' channel is now available on the fourth-generation Apple TV's App Store. The app will enable you to live stream the upcoming Apple keynote on Monday, March 21 at 10am PDT. In the meantime you can also re-watch Apple's previous keynotes going back to WWDC 2014.
Unlike the Apple Events channel on older Apple TVs, which automatically appeared on the Apple TV on the day of the event, fourth-generation Apple TV owners will have to manually download the Apple Events app from the App Store.
Apple has previously announced that the keynote will also be live streamed on its website if you use Safari on iOS or OS X, or the Microsoft Edge browser on a PC. Apple has also stated that the second and third generation Apple TV will also be able to stream the keynote. Although the Apple Events channel is not yet available on those older Apple TVs, in previous years it has appeared on the Apple TV a few hours prior to the keynote.
More screenshots of the Apple Events app for the fourth-generation Apple TV are embedded below.