I've had trouble doing this in the past with movies I rented from iTunes, but I haven't tried it in the last couple of years. I just rented No Time To Die and would like to watch it on a flight later today. I started the movie at home to make sure it works. Then I turned off WiFi and started it again. Still works. But I'm paranoid that it won't work because this has happened before. Any other tricks to make sure it works?