Most users use the Downloader app by FTV News to fetch the APK file directly on their Firestick or Android TV.
How to Install Viva TV APK on Firestick & Android TV (V1.8.1) Download VIVATV [MOD EXTRA] apk
It is strongly recommended to use a VPN (e.g., NordVPN or Surfshark ) when using such apps to encrypt your traffic and protect your privacy. Installation Method (Sideloading) Most users use the Downloader app by FTV