I've been to a number of places that have these rented units. Internet connected, remote managable and updateable playlists from the supplier.
Recently went to a non profit movie screening here in town. Luckily the person organising it had the forethought of not breaking any rules, approached the distributor with the situation and was granted a one time public display licence of the title, and the only restriction was the number of person audience (set at 45.. or was it 70)
Churches also gain these so they can show movies as part of the youth groups etc