iCloud Photos automatically stores your full-resolution photos and videos in iCloud. iCloud Shared Photo Library lets you share photos and videos seamlessly with up to five other people (separate setup is required on an iPhone, iPad, or Mac). You can access iCloud Photos and Shared Photo Library from any device using the same Apple Account.

You can’t edit photos and videos on Apple TV, but you can use the Photos app on iPhone, iPad, or Mac to edit them and have those changes automatically update on Apple TV and all of your other devices.