The questions are not stupid, as this digital content stuff takes lots of brain effort to wrap your mind around.
The streaming that PowerDVD can do is local digital media content (photos, videos, audio files) that is on your PC to another player, such as a TV (if is supports DLNA steaming) or on another computer that is on the same network. Or from another media server. It is an older technology and is for streaming on a local network. PowerDVD can also cast this media to Apple TVs, Roku player, etc. It is all about the digital media files on your computer.
Amazon and Netflix content is different and is streamed via a web browser or apps they create for other devices, like PS4 and smart TVs. I doubt they would want to embed their app inside PowerDVD. If you log in to Netflix, I am assuming you mean in your browser, then you play the content in your browser. This is what I do at lunch when I am at work.
The reason PowerDVD can't play your rented iTunes movie is because of Apple's own digital rights management. It wants you to play it on their players (iPhone, IMac, iPad, Apple TV) and don't allow it to be played on another app.
Dave
This message was edited 6 times. Last update was at Apr 11. 2019 03:00