Most on demand movie services charge a fee to order movies online. However, during special promotional periods, certain movies are offered free for a limited time or to a limited amount of customers. Select the free movie and then click the purchase button. The word free displays instead of an actual listed price. Immediately, the movie begins to download.
There are two types of video on demand services. The first one is usually provided by cable companies as part of their service package. Find the videos on demand section by turning to a preset channel on a digital cable box or by hitting a special button on the remote.
The video on demand service lists and organizes movies by titles, genres and special categorizing, such as new releases. Each movie selected lists a price, rental period and quality of film -- standard definition versus high definition.
Amazon, Netflix and iTunes are the most popular online video on demand and film streaming services. iTunes' customers can only buy their favorite movies as individual downloads. However, Netflix offers its customers unlimited movie streaming for a monthly fee. Amazon offers its customers both unlimited streaming with its Amazon Prime service and the option to buy or rent newer films on demand.