Netflix doesn't supply Linux with 1080p streams, for exactly this reason. Any platform that doesn't encrypt the video path so screen recording isn't possible is limited to 720p.
https://addons.mozilla.org/en-US/firefox/addon/netflix-1080p...
How close to the liquid crystal cell do we have to be to get unencrypted pixel data?
Yes there is encryption (HDCP), but it was broken almost immediately. Many choices to buy a cheap decrypter on Ali Baba…
Yes. If your device and cables don't support HDCP [0] you won't be able to play netflix, prime, hulu, etc on it.
[0] https://en.wikipedia.org/wiki/High-bandwidth_Digital_Content...