We have a Firestick on the older tv and the new one is a "smart" tv. will rely on my sons to see if I can steal some movies.
Not sure if you can get into the software on a Smart TV to set things up. It's probably a manufacture to manufacture thing, but you need to be able to instruct the TV to load APK files.
Firestick is no problem, here's the link:
Cinema APK on a Firestick
Always a good idea to use a VPN with these sorts of things. I've wondered if our "Da Box" friends know or do that...