tvOS 9.2.1 (build 13Y5763c) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2016-04-21T17:00:12Z. The update package is 38.73 MB. This is a delta (partial) update that requires 9.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c9f601331ece92a2ba080abcede01acd45e76abb.zip.