Do you mean DVD rental places? If so, then they pay a small amount to the copyright holders each time a DVD is loaned out. The same is true for libraries when they loan books out.
no they dont.
they just pay a one of price to buy the film which is a very high price including royalties to the company
ie. to buy one copy of a film they would pay about £ 50
its not done on a "each time it rents out" basis