Safari: can't take screenshots from Udemy
Hello everyone.
I use to follow courses on Udemy and I used to take screenshots (with keys combination Cmd+Shift+5) of videos to make some kind of presentation for myself.
This perfectly worked until recent time. Now, if a try to take a screenshot of a playing video, I get a black image, with the white "playing triangle" if video is paused.
My first idea was that Udemy had introduced some kind of control forbidding to take screenshots, but if open videos in Chrome I can still take pictures of screen.
This strange behavior on Safari figures out only on Udemy (I made an attempt with YouTube).
Does anyone know what happened with Safari?
Thanks for support.
MacBook Pro 15″, macOS 10.13