Q: itune account on iPad

If iTunes Match or automatic downloads are used on a computer or device, or past purchases are re-downloaded on it, then it may become associated (and tied) to that account for 90 days : http://support.apple.com/kb/HT4627 (I believe that it's an attempt to try and stop people sharing their content, but unfortunately can affect families or people with multiple accounts).

You could try contacting iTunes Support and see if they can remove that association, and therefore the 90 day countdown : http://www.apple.com/support/itunes/contact/ - click on Contact iTunes Store Support on the right-hand side of the page.

Or if your account is authorised on the computer that their Minis are synced to then you could try syncing the films to it from there (I'm not sure if the 90 days will affect syncing). If you don't have the films on that computer then you can copy them over e.g. via home sharing or a USB drive (File > Add To Library) : http://support.apple.com/kb/HT4527 (that page says that it is for music, but it should work for films as well). Signing into your account and re-downloading the films on that computer would risk tying that computer up for 90 days.