Most streaming rippers have their toolsets and methods and often tend not to share them in fear of the streaming companies finding out and patching exploits up.

Hope the content you want turns up on torrent sites.

Pretty tricky. There's essentially no way for the average pirate.

this guy claims the audio was unencrypted 4 years ago if you want to rip just the audio. movpilot claims it can download Prime videos but i haven't looked into it

Buy a screen grabber for 5 bucks