You can now watch YouTube videos on the Xbox Series X|S. In the YouTube app you can view your subscribed channels, search for content, and use your mobile device as a remote.
YouTube is available in 4K on Xbox One S, Xbox One X, Xbox Series S, and Xbox Series X models. The maximum resolution for the original Xbox One console is 1080p. HDR playback is supported on Xbox One S, Xbox One X, Xbox Series S, and Xbox Series X models.