OTA firmwares cannot be restored to. IPSW Downloads collects them for potential future use. They might also be useful if you're doing research.
| ✗ | Apple TV 4 (2015) | tvOS 9.2.2 (13Y816) | June 6, 2016 | 816 MiB | 4de77e54556a581310c4b0451f2fa8e1552c1a32.zip |
| ✗ | Apple TV 4 (2015) | tvOS 9.2.2 (13Y807) | May 23, 2016 | 816 MiB | 41515dd3416a5e5d042f2e974db5c5b2e1ae139a.zip |