This is far and away the best method for 95% of people. Major streaming services allow you to download movies for offline viewing within their apps.
For most users, the most efficient method is using the built-in "Download" feature within major streaming apps. This is ideal for flights or areas without Wi-Fi.
No internet needed after transfer; you control the files forever. Cons: Requires computer + cable; must manage storage manually.
If you prefer to buy or rent movies individually rather than paying a monthly subscription, the Apple TV app (formerly iTunes) is seamlessly integrated into the iPad experience.
