How to rent videos on Amazon Prime Video even if you aren't a Prime subscriber, or cancel mistaken rentals

· You can rent movies and shows on Amazon Prime even if you aren't a subscriber — all you need is an ordinary Amazon account. 
· Find the movie or TV show you want to rent on the Prime Video web site or app and select the display quality, such as SD or HD.
· You have 30 days to start watching, but as soon as you do, you...