Videos do require 2257 information on the boxes now. Our new videos that are hitting the store shortly had to have the 2257 at the bottom, as if it was on a website.
As for getting model ID's, you can ask. But as long as you keep information about that content provider at your place of business then you wont have many worries.
Just keep your records and the information about your providers right next to the door
Either way though, last time I heard the FBI/Police nock on the front door of a porn company was, well... Never. They always seem to RAID them so either way your still fucked based on how the world really works.