Apple TV Photos app at a glance
The Photos app 
lets you enjoy your pictures and videos on the big screen. You can use the following services to view the photos and videos from your iCloud account:
iCloud Photos: iCloud Photos automatically stores your full-resolution photos and videos in iCloud. You can access iCloud Photos from any device using the same Apple ID. You can’t edit photos and videos on Apple TV, but you can use the Photos app on other iOS and iPadOS devices and Mac computers to edit them and have those changes automatically update on Apple TV and all your other devices.
Memories: You can view all the memories created on your iOS or iPadOS device, or Mac. You can also adjust playback settings, see all the photos and videos that make up each collection, and more. See View photo memories on Apple TV.
My Photo Stream: My Photo Stream automatically uploads new photos taken on an iOS or iPadOS device to your other devices that use My Photo Stream, including Apple TV.
Shared Albums: You can view albums of photos and videos shared from another iOS or iPadOS device or Mac using Shared Albums, or view other people’s shared albums if you’re subscribed.
Note: Photos shared using Home Sharing on your computer appear only in the Computers app 
, not in the Photos app . See View photos from your Mac on Apple TV.
Turn on access to photos from iCloud
Open Settings
on Apple TV. Go to Users and Accounts > iCloud, then turn on iCloud Photos or Shared Albums.