Download and install it., On Fire TV devices specifically - please follow our guide on enabling unknown sources before continuing. Visit the app store on your device and search for the Downloader app. Android TV devices (Nvidia Shield, Xiaomi Mi Box and all of the various TV Android Boxes) and Fire Tv devices Step 1
In this guide, we'll be covering the second method and how we make it easier for you to get all of the apps you're interested in. Let's say you're in the UK but you want to be able to download and install the Hulu or HBO Max app which are only available in the US. Some apps may not be available to some users due to Google restricting the available apps on the Google Play Store according to the country the account is registered in.
How to install apps that are not available in your country on Android, Android TV or Fire TV devices - Filesynced