Entertainment on OSN Store is available to either "Buy and Keep" or to "rent" and here's the difference between both options:

• When you "Buy and keep" a movie or a series, you can keep it for an unlimited amount of time in your folder to watch anytime, anywhere you want and as many times as you want.
• When you rent a movie or series, it is available for you to access in your folder for 30 days, however, once you've started watching it, you have up to 48 hours before it is removed from your folder.