Watching the new movie on Television as opposed to on a computer, tablet or telephone

Hey Ya'll:

What's the best way to watch the new movie ("Dear Kelly") on a TV, as opposed to on a computer? I have an Apple TV box and a Firestick, if that helps. I would imagine the $15 price tag lets you download a copy of the movie and save it to a flash drive, but I'd rather just pay the $5 to rent it because I rarely watch movies more than once, but will that just let me see it on the computer I rent it on?

Also, please no spoilers!!