I download Prime videos on my iPad for offline viewing. For some reason, I don't want to renew my Prime membership. The question is, will my downloaded Amazon movies expire after that? Is it possible to keep them playable after canceling subscription?
Yes and no. As one of the popular video streaming services, Prime Video provides thousands of exclusive movies or TV shows for online or offline playback. During subscription, you can, of course, download the selected titles for watching anywhere anytime. But once subscription ends, you can not access the downloaded Prime videos anymore. In addition to this, you may have other questions regarding Prime Video's limits. The following part will explain to you one by one.

Question 1: How many devices can you have Prime Video on?
You can stream the same Prime video on no more than two devices at a time, and no more than three titles under the same Prime account.
Question 2: Do Amazon Prime Video downloads expire?
Your Prime Video downloads are temporarily saved offline, and they will be expired after:
a. Typically, only 30 days for the downloaded Prime videos to begin to watch. Once you start playing it, you will have only 48 hours to finish enjoying it. After that, will expire.
b. Generally, you can not watch any Prime video once your Amazon Prime or Prime Video membership is canceled.
Question 3: How to keep watching downloaded Prime Video after subscription ends?
If you cancel Amazon Prime or Prime Video subscription early, you can still continue to watch titles until the next billing date. Once your membership ends, your downloaded Prime movies or series will become unavailable to access. Unless you've purchased or rented the videos.
Amazon applied encryption technology to all of its content. When you go to the download location of the Prime videos, you will find that they are saved as incomplete and scattered files.
So, to truly make a backup on your favorite Amazon videos, you will be required a third-party tool - TuneBoto Amazon Video Downloader - to help you download Prime videos as MP4 or MKV files locally. After that, you could keep Amazon Prime videos playable after canceling subscription.

Amazon Video Downloader
Next, we will show you the detailed steps on how to use TuneBoto Amazon Video Downloader to download your Prime videos in MP4 format with HD resolution kept. Before getting started, please make sure you've installed TuneBoto on your Win or Mac computer.
Step 1 Install and Open TuneBoto Amazon Video Downloader
Run TuneBoto Amazon Video Downloader on Windows or Mac computer and log in to your Prime Video account. The Amazon Video login window needs to be opened by entering any keywords in the search box and clicking "Enter".
Note: TuneBoto needs to work with an Amazon Video account. But don't worry, it will not take any other information from your account than the videos.

Step 2 Choose Output Settings
Click the "Setting" button at the upper right, and choose your preferred Video Format (MP4, MKV), Output Quality (High, Medium, Low), Audio & Subtitle, Output Path, etc.

Step 3 Find Prime Videos on TuneBoto
Enter the name of Prime video or directly copy & paste the video links from the web browser to TuneBoto, then press "Enter" on your keyboard. After seconds, you will find that the related Prime videos listed.

Step 4 Start Downloading Amazon Video
Finally, please click the "Download" icon, the program will start downloading the Amazon videos to computer with up to 1080P resolution kept.

Once the downloading process is over, click the "Library" tab on the top and you'll see all downloaded Prime videos listed. Click the "Folder" icon next to each title and you'll be directed to the output folder on your local computer right away.
Now, you've got the open MP4 format of Amazon Prime content, and it's time to transfer Prime videos to USB drive, iPad, Kindle, and more to watch them even after the subscription cancellation. Besides, TuneBoto offers the free trial version for users to test its awesome features. Now, give it a shot!
Note: Only the first 5 minutes of each video can be downloaded with the trial version, please purchase a license to enjoy the full video. It is suggested that to download the trial version and have a test before purchasing it.