Prime Video is both a subscription viewing environment and a storefront for other ways to access a title. Finding a film in its search results does not settle whether it is included in your membership. The practical question is the offer attached to that exact title in your account and region.

Read the viewing offer, not just the poster
Amazon distinguishes content included with Prime from rentals, purchases and add-on subscriptions. Those routes can appear within the same service interface. A title that requires an additional transaction should therefore be compared by its displayed offer and terms, rather than by the fact that it appears in Prime Video.
If a screen presents more than one route, identify which one you are selecting before proceeding. Keep the title, edition and chosen transaction together with the receipt; this is more useful than recording only “Prime Video”.
An add-on has its own subscription decision
An add-on subscription is not the same entitlement as the included catalogue. Amazon’s help page describes additional subscription fees for those services. A similarly named service offered directly through its own app can also involve a different billing relationship.
Before switching between an add-on and a direct subscription, identify the existing billing route. The aim is to understand the account arrangement first, rather than opening another subscription in the hope that it will restore access.
A rental is time-limited access
Amazon’s rental guidance distinguishes the period before starting a rental from the period after playback begins. Use the specific offer displayed for your title, because viewing periods can vary. Do not start a rental just to test it if you are not ready for the viewing window to begin.
Purchased access also follows the service’s terms; it is not the same object as an unrestricted video file. Keep the purchase record and use the supported account and device routes.
How this reference relates to IPTV USA
This page explains the identity and purchase choices of Prime Video. It does not establish that IPTV USA supplies Amazon credentials, a Prime membership or any particular add-on. A programme enquiry should name the exact title and viewing route you are asking about.