I'm going on a trip and want to watch a couple movies on the flight. I won't have Internet so does that mean I need to "buy" the movie or can I "rent" it and watch it without data capabilities?
You can rent a movie and watch it while offline. You just need to make sure you download the movie before you lose internet access on the flight. I would try renting, downloading, then turning off wifi and try watching it with your device offline just to test it out before its time to board the plane!