If you google for: Realplayer 'Download this video' button no longer works in Youtube
there are settings you have to tweak to get it back, depending on which version number Browser and Real Player you are using.
How to make yourself look better on a webcam
Doraemon postage stamps? Yes please!
Users report serious problems with macOS Catalina 10.15.4
Les clés Windows pas chères fonctionnent-elles ?