I rented 3 movies, but when I tried to watc them a MPAVControllerErrorDomian error 3 message pops up.

Hi Mac-user99,

I see that you are expressing some issues with your ability to access some movies that you have rented, and specifically, you are receiving an error code that is titled “MPAVControllerErrorDomian error 3.” I have a couple of suggestions for you regarding this error that may help you resolve the issue. First, try simply restarting your device, then resetting it:

Restart or reset your iPhone, iPad, or iPod touch - Apple Support

http://support.apple.com/en-us/HT201559

You may also want to consider signing out of iTunes and App Stores, then signing back in, to see if that affects your situation:

App Store settings - iPhone

http://help.apple.com/iphone/8/#/iph64c6c9f05

Thanks for using the Apple Support Communities. Have a good one!

-Bradenhttp://help.apple.com/iphone/8/#/iph64c6c9f05

iTunes Store: Movie rental usage rights in the United States - Apple Support

iTunes Store: Film rental usage rights in Europe - Apple Support

iTunes Store movie rental usage rights in Canada - Apple Support

**** you should probably read the articles before giving bad information ..

Learn more

Important: If you move a rental to iPhone, iPad, or iPod and then use iTunes to restore iPhone, iPad, or iPod before you finish watching it, the movie rental will be deleted and will not be recoverable. This also applies to choosing Settings > General > Reset > "Erase all content and settings" on iPhone, iPad, or iPod touch.