By providing superior customer service, reasonable rental prices and an excellent, fully stocked movie selection, Potomac Video has grown to 14 stores in Maryland, DC and Virginia while other video/DVD stores are shuttering. Membership is free -- all you have to do is fill out a short form with your credit card info, driver's license number and phone number. Free two-night new-release rentals can be earned by returning four new releases the same day you rent them; you can also call and reserve in-stock titles for same-day pickup.