YouTube on Android TV is constantly evolving, with the latest update being a more prominent "Subscribe" button in the player interface.
This new feature allows users to quickly and easily subscribe to channels while watching videos, eliminating the need to navigate to the channel page.
The "Subscribe" button appears only for channels that haven't been subscribed to, and disappears once you've joined the channel.
This change aims to encourage more users to subscribe to their favorite YouTube channels, simplifying the process and enhancing user experience.