My LG TV webOS YouTube app, generates some hard to hear sounds when menus and content is navigated. Even thought I am not logged in in YouTube app, I suspect they can be captured by an Android device nearby and correlated with that device user. The apps that have the login data already can share whatever they like. There was a story some years ago when even shared local media names were shared by some TVs. If you have a device connected to network, you can be sure it will share whatever it can, malice intent or not.