Xfinity intentionally makes using Stream as difficult as possible to push their streaming box. You can ONLY use this app on your phone. You cannot miracast to your TV. You cannot connect an adapter cable to your TV. You cannot use Dex to get it on your TV. There is no Roku app. There is no Xbox app. They even blocked using the Xfinity Stream website through the Edge browser on Xbox. Your only option for TV without their streaming box is to hook up a PC or Mac, which has serious subtitle bugs.