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 10.1.1 (14U712a) | January 23, 2017 | 986 MiB | c4e4aea85a4e9a2a8309608515cb04abdd9e78e7.zip |
| ✗ | Apple TV 4 (2015) | tvOS 10.1.1 (14U6712a) | January 23, 2017 | 986 MiB | c4e4aea85a4e9a2a8309608515cb04abdd9e78e7.zip |
| ✗ | Apple TV 4 (2015) | tvOS 10.1.1 (14U711) | January 9, 2017 | 986 MiB | 92c352181a333e01845f58700e957f4354a1ef6b.zip |
| ✗ | Apple TV 4 (2015) | tvOS 10.1.1 (14U707) | December 14, 2016 | 986 MiB | e4d0da2e72494ff8adb54d2452fbcb09b253e73e.zip |