Netflix is DRM'd anyway so it's a non-starter. Try taking a screenshot of a Netflix stream. Not many people realize it'll just result in black pixels for that area.
This reminds me of the old windows 98 times, where windows would just draw a blackish rectangle where the video should be and the graphics card would replace the pixels with actual video on-screen. If you hit the print button, you would just copy the windows graphic buffer with no video to be seen.
It got extra weird when you would paste the screenshot into paint with the video still playing. Suddenly you had a video playing inside paint and could even draw on it...
I'm not sure I should share my secrets now lol. But the answer is linux. I haven't tried screensharing before. But I have tried with other DRM stuff and it got blocked. So I wouldn't be surprised if this was a fluke. Definitely makes making memes easier though.
If the video quality is low enough then Netflix and co don't bother. It also varies on who is the content supplier, some are less fussed about protecting content that doesn't bring in much money.
