No video playback with Netflix and browsers using mirrored virtual display

[cawv]

I have a Samsung G9 - 49
To get a HiDPI resoltution better than Apple MacOS on my Mac Mini M4 I do use a virtual display mirroring my G9 so a can freely set any resolution and scale.
suddenly today, it stoped playing back Netflix on all my browser; Chrome, DuckDuck, Firefox and even Safari.

[waydabber]

Virtual screens don't support HDCP (never did). Maybe Netflix disabled the fallback option to play videos without HDCP?