I got Amazon Prime Videos to work with the latest leaked OS 10.3.1.2267.
Had to go back to the older version of Amazon Shopping 1.0.50.2010. It works in conjunction with Amazon Instant Video version 1.0.0.1. I found both APK files on the apkmirror.com website and downloaded them directly from there.
The newer versions of the Amazon Shopping app do not work for some reason.
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