tvOS 12.2 (build 16L5226a) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2019-03-18T17:16:37Z. The update package is 305.38 MB. This is a delta (partial) update that requires 12.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4d76272dfacf37851644f79ffb07d061e00f1885.zip.