Making it black doesn't fix the problem I'm mainly worried about - when I'm playing games, the site doesn't even register the mouse when it's at the top of the screen, which is Insanely annoying. The line I have is a single pixel thick, and I'm running Ubuntu 18.04.05
the answer I found inside the file /usr/lib/x86_64-linux-gnu/opera-developer/resources/widevine_config.json. I saw that vivaldi opened the spotfy webplayer without any problems, so I looked in the browser folders for the folder that the opera file directed. After finding vivaldi's WidevineCdm folder, I created the following directory in - /opt/google/chrome/ - after that I went to - /var/opt/vivaldi - and copied the WidevineCdm folder into - /opt/google/chrome / -. I closed the opera and opened it again and everything went smoothly
@lu-menard It's a site issue. It's sending only the Flash based version of the video player to Opera (and Firefox as it seems).
Try disabling Flash at all on settings. Even better, try uninstalling it if don't still need it.