Download capabilities have nothing to do with Pocket TV itself. It mainly depends on whether the app itself supports downloading. If Amazon Prime APP supports downloading, then Pocket TV will be able to download the video resources into Pocket TV.
If Amazon Prime APP supports downloading for some resources and not for others, then we also support downloading for some resources and not for others.
Generally some TV APPs, many of them don't support downloading, because TV itself is a device placed at home and often connected to the Internet, so there is no need for mobile portability, and many streaming media APPs don't add the downloading function to their APPs.