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Apparently, he’s only available on 2nd Gen 4K Apple TVs and up. The Snoopy screensaver is somehow too complicated to work on 1st gen 4K Apple TVs 🤷🏽‍♂️
That makes sense, my 1st gen 4K Apple TV is capable of 4K movies and gaming, and my Apple Watch is capable of Snoopy, but it stands to reason that my 4K Apple TV(1st gen) isn't powerful enough to play non-interactive clips of snoopy. /s
 
Sadly I've tried a complete reset and removed all apps. All 3 Apple TV's in my household have the same issue. I now just use a remote folder on my old Mac Mini, it's just a bit annoying because I need to manually update it every so often.
I just remembered another trick I needed to do: go into screensaver and change your theme preference, start the screensaver, then go back into settings and re-choose your original theme. After that it takes about a day for the other screensavers to populate, but then they start to show up.

I found that trick on a forum thread somewhere awhile ago and it's worked for me a couple times. Hope that helps.
 
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