Amazon Prime Video is able to remove a video from your library after purchase.
We are contacting you regarding a past Prime Video purchase(s). The below content is no longer playable on Prime Video.
In an effort to compensate you for the inconvenience, we have applied a £5.99 Amazon Gift Card to your account. The Gift Card amount is equal to the amount you paid for the Prime Video purchase(s). To apologize for the inconvenience, we've also added an Amazon Gift Certificate of £5 to your account. Your Gift Card balance will be automatically applied to your next eligible order. You can view your balance and usage history in Your Account here:
It's been well documented that Amazon does this with eBooks all the time. A publisher pulled a copy of PRIDE AND PREJUDICE from Amazon over a contract dispute in the earlier days of the Kindle. So Amazon reached out and delete that copy from all Amazon customers who bought it through the Amazon Store.
Students who were annotating it for class lost all their notes. Amazon refunded the cost of the eBook. But those notes are toast.
It's what prompts me to copy non-DRM'ed files to my Kindle and read them without Amazon having a record of purchase. It won't stop them from logging in remotely and wiping the device, but I have backups and programs to convert them to non-Kindle format for another eReader.