Opera is unable to play videos in MX Linux KDE version

I recently installed and started to use the Opera browser as it offers a wide range of functionality and the workspace feature: it seems very viable for me. But when it comes to playing videos, this browser is giving me lots of trouble. So let me add a screenshot to show what actually is happening here. The same goes for Netflix; here is the screenshot. Are there any workarounds to this problem? I really love this browser; I want to use it for this purpose.