How you put a VPN on a TV depends on what the TV runs. Google TV and Android TV run Android apps, so the GhostShield app for Google TV installs from Google Play like any other app: sign in, pick a server, connect. Samsung TVs (Tizen), LG TVs (webOS) and Roku players cannot run VPN apps from any provider. For those, the VPN goes one step upstream: on a router that supports WireGuard, add GhostShield's manual WireGuard configuration, connect the TV to that router, and everything the TV sends goes through the tunnel. The same router method covers a Fire TV Stick or an Apple TV, which have no GhostShield app.
Streaming services license shows country by country and pick the catalogue from your IP address. Connect to a GhostShield server in the country whose catalogue you want, then open the app on the TV. GhostShield has servers in 16 countries. If an app still shows your home catalogue, close it fully, clear its cache on Google TV, and try another server in the same country. Some services block addresses they know belong to VPNs, so no VPN can promise that every app works on every server; the streaming guides cover each service.
Smart TVs also report what you watch. Many use automatic content recognition, which identifies what is on screen and sends it to the TV maker. A VPN encrypts that traffic on the way out and replaces your home IP address with the server's, so your internet provider cannot read it and the reports are harder to tie to your household. It does not stop the TV maker from receiving them: for that, turn off automatic content recognition in the TV's privacy settings (Samsung calls it Viewing Information Services, LG calls it Live Plus).
4K streaming needs about 25 Mbps. Every VPN adds a hop, so pick the nearest server that has the catalogue you want and give the TV a cable or a strong Wi-Fi signal. To see what is left, run a speed test on a phone on the same network with the VPN on.