Sounds like such a block would be highly dependant on a specific recorder + driver combo. In the name of science I’ll do some experimentation tonight.

UPDATE: Worked just fine for me.

Netflix running Bojack Horseman in Firefox under Linux Mint, stock NVIDIA 550 driver, and replay-magic as screen recorder.

There’s probably a better way, but you could go for a low-brow approach: use a screen recorder on your PC and let the video play. Then you trim the recording and encode it to your format of choice.

Are you asking how to torrent something, or how to rip it from the Amazon stream directly?