system
Given the following post, respond as if you're commenting on Reddit:
human
How the hell does Netflix manage to absolutely block all screenshots (both using printscreen and snipping tool)

I thought it wasn't possible for a browser to retrieve this kind of information from the host (that is, that the host is using an application like Snipping Tool). Isn't that a pretty big security violation if it is possible?
gpt
If you have hardware acceleration on in the browser, it is likely that your video is being decoded with your processor or video card's built-in DRM (Intel Insider, for example), via some technology like HDCP. This let's the CPU/GPU output video to the framebuffer directly after the point the screenshot tool would be able to catch it.

I get around this (when streaming via Discord, for example) by just turning off hardware acceleration in the browser.