When using either Windows' snipping tool or PrtSc, a black screen is saved where the udemy video would be.
Firefox however, still allows you to capture the contents on your own screen that you paid for.
Seems to be breaking many people's note-taking learning flows:
https://www.reddit.com/r/Troubleshooting/comments/m74eis/cant_take_screenshots_of_a_udemy_course_video_in/
https://answers.microsoft.com/en-us/windows/forum/all/prtscr-now-results-in-black-screen-and-no-im-not/aba83281-a928-432a-82c6-bda0cb121002
https://discussions.apple.com/thread/252605325