While using Windows 10 (Build 19042), I tried taking a screenshot of frame from a video played on a popular website using Google Chrome and Edge browsers, and the video player part of the website was blackened (on purpose, I assume).
This fails when using the prt sc keyboard button, snipping tool, and Winkey + shift + s utils.
When using Chromium web browser in Ubuntu however, taking screenshots with any available tools does not block the video section.
I assume in Linux systems such censoring is not possible due to the X Window System architecture, thus such censoring methods are less possible to achieve.
Is this some sort of hard-coded feature in Windows 10 regarding copyrights, or is it a web browser hardcoded feature? If it's Windows that's doing it, how does the OS recognize a video block to be censored inside a running software such as a web browser?