The particular limitation that applies to every video is determined by whether you access them by buying, renting, paid subscription or trial, or for free. 

Purchased Videos

When you buy a video for on-demand viewing, you can download it to four compatible download devices, including Fire tablets (other than the Kindle Fire 1st Generation), Android, and iOS devices.

Viewing Period: Indefinite — you can stream and restream your bought videos as many times as you want.

Rental Videos

While you are renting a video for on-demand viewing you can download those for some instance to your compatible download device

Rental video may not download on some other device or can be watched on various devices with the same amazon account once it’s downloaded to compatible devices. After downloading the videos you can also switch your compatible devices to watch that video.

Viewing Period: For rental videos, After a video is downloaded, you have 30 days to start streaming it and 48 hours to finish streaming it once you start watching it

. Prime and Prime Video Subscriptions (Other than Mobile Edition)

Videos available through a paid Prime or Prime Video subscription or promotional trial are temporarily available for download on compatible devices.

 Subscription titles :The subscription title’s page indicates whether we can download the title or not. You can only download available titles to two devices at once. To download a title on another device that is already stored on a device, you should delete it before downloading the title to another.

Viewing Period:. When it comes to downloaded videos, you usually have 30 days after downloading them to start watching them, and you usually have 48 hours to finish watching them. 

Titles that are accessible can be downloaded on a single mobile device (both ios and android) at a time. To download a title on another device that is already stored on a device, you should delete it before downloading the title to another.

Viewing Period: Any video marked included with a prime video subscription in its detail can be streamed multiple times. When it comes to downloaded videos, you usually have 30 days after downloading them to start watching them, and you usually have 48 hours to finish watching them. 

Third-Party Add-On Video Subscriptions

Prime videos also contain third-party add-on video subscriptions. A lot of third parties added subscription titles that are available temporarily for downloading. For every third-party added video subscription, there are their description pages which indicate if they are available for download or not. Available titles can be downloaded at most on two devices at once. To download a title on another device that is already stored on a device, you should delete it before downloading the title to another. 

Viewing Period: You can play and replay any of the videos which are included on the main site of the applicable third-party add-on subscription. When it comes to downloaded videos, you usually have 30 days after downloading them to start watching them, and you usually have 48 hours to finish watching them. 

CONCLUSION 

What exactly are Compatible devices?