Working for me on the Apple TV app and on the Windows Store app.
Credit to BlazinPast
Note: You don't need an Apple TV subscription. If not using Apple/Mac, you can create an apple account and download the Apple TV app in Windows and purchase/watch the film. You could potentially download the Apple TV app on your Smart TV and purchase there too. Once purchased, you can watch on the Apple TV app on your Smart TV. The subscription is an additional feature for Apple TV - buying/renting films is separate. You cannot use Android to purchase/watch the films.
I bought this a couple hours ago, insane deal, clearly a price error, but I bought a price error before, and it didn't get taken away.