Apple has released the second developer beta of tvOS 9.2.1 for the Apple TV. Developers can get it right now from the tvOS Developer Resource Center.

tvOS 9.2.1 beta 2 now available for developers

Following the fairly important release of tvOS 9.2, which added app folders, Siri text field dictation, and more, it's expected that version 9.2.1 would be a fairly minor release, likely containing bug fixes and performance improvements.