Most major services let you download movies to the or their own app.
These files are encrypted. You can only watch them inside the specific app, and they usually expire after a certain time (usually 30 days) or if you leave the app open for too long without an internet connection. how to download movies on ipad
If you prefer owning your movies or renting the latest blockbusters, the built-in is your hub. Most major services let you download movies to