APPLE INSIDER
YouTube is planning to discontinue support for its dedicated Apple TV channel, meaning third-generation devices will no longer be able to access the service.
The video platform recently began to inform users that the channel will be shut down starting next month, reports 9to5Mac.
Starting early March, the YouTube app will no longer be available on Apple TV (3rd generation). You can still watch YouTube on Apple TV 4K, Apple TV HD, iPhone, or iPad. With AirPlay, you can also stream YouTube from your iOS device directly to any Apple TV (3rd generation or later).
Source: APPLE INSIDER