There are certain apps that might not be officially available on the Chromecast with Google TV. To use those unavailable apps, you need to sideload them on your Chromecast with Google TV using third-party installers like Downloader or Send Files ...
If you like to sideload apps on Google TV, you need the Downloader app. Fortunately, Downloader is officially available on Google TV and can be installed from the Play Store. Downloader lets you sideload the apps that are unavailable on ...