After you download a title, you have up to 30 days to watch it before it expires from your device. Once you hit play on your downloaded title, you have 48 hours to watch it before it expires. You can watch a downloaded title as many times as you want before it expires.
Note: While you have up to 30 days to watch a downloaded title, keep in mind that downloads take up memory and space on your device. The number of titles you can download is dependent upon the available memory/storage space on your device. You can always see when your download expires under the MY DOWNLOADS section.