A list of the feeds Apple uses for its video screensavers

apple-tv-screen-saver-feeds.txt

tvOS 10: 1080p + H.264
http://a1.phobos.apple.com/us/r1000/000/Features/atv/AutumnResources/videos/entries.json

tvOS 11: 1080p/4K + SDR/HDR + HEVC
https://sylvan.apple.com/Aerials/2x/entries.json
https://t27q97zg19.execute-api.us-east-1.amazonaws.com/prod/aerialAltJSON/4kEntites.json

tvOS 12: 4K + SDR/HDR + HEVC, 1080p + H.264, localised descriptions 
https://sylvan.apple.com/Aerials/resources.tar

tvOS 13: 4K + SDR/HDR + HEVC, 1080p + H.264, localised descriptions 
https://sylvan.apple.com/Aerials/resources-13.tar

tvOS 15: 4K + SDR/HDR + HEVC, 1080p + H.264, localised descriptions 
https://sylvan.apple.com/Aerials/resources-15.tar

tvOS 16: 4K + SDR/HDR + HEVC, 1080p + H.264, localised descriptions 
https://sylvan.apple.com/Aerials/resources-16.tar

macOS 14: 4K 120FPS + 240FPS, localised descriptions 
https://sylvan.apple.com/itunes-assets/Aerials126/v4/82/2e/34/822e344c-f5d2-878c-3d56-508d5b09ed61/resources-14-0.tar

https://sylvan.apple.com/Aerials/resources-17.tar doesn't seem to exist. Do you know where the new tvOS 17 aerials are stored?

https://sylvan.apple.com/Aerials/resources-17.tar doesn't seem to exist. Do you know where the new tvOS 17 aerials are stored?

They are stored here: https://sylvan.apple.com/itunes-assets/Aerials126/v4/82/2e/34/822e344c-f5d2-878c-3d56-508d5b09ed61/resources-14-0-10.tar

macOS 15 has changes to the screensaver manifest, this seems to be the newer manifest:
https://configuration.apple.com/configurations/internetservices/aerials/resources-config-14-1.plist
The binary has this file located alongside the plist: https://sylvan.apple.com/itunes-assets/Aerials126/v4/82/2e/34/822e344c-f5d2-878c-3d56-508d5b09ed61/resources-14-1-0.tar
I did not see any changes on tvOS 18.

Does anyone know what settings or program were used to encode the videos here? I have tried for a long time to encode a video that is compatible with Apple's Sonoma background wallpaper video thing, but haven't been successful. So far, the default test footage h265 from an iPhone comes the closest to playing (after exiting screensaver, it flickers back and forth a few frames and only sometimes results in black screen), but anything I made in ffmpeg will play correctly once and then display a black screen once the screensaver exits. If I replace the file with another one of Apple's own, it will work correctly, so clearly there is something wrong with my videos.