tvOS 9.2.1 (build 13Y6772) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2016-05-16T16:44:18Z. The update package is 815.91 MB. This is a full OTA update that can be applied from any compatible base version. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 5ff1e79b86e8e5d626e2df93eb5da7586b0932f9.zip.