English Translate:
I suppose that after some update, this error started to occur, since I haven't made any modifications to the extensions or configuration.
While using YouTube, Opera GX gradually increases the RAM consumption (in any state: home page, video, settings, etc.), consuming all available RAM in the system until it freezes the PC and then the page shows an insufficient memory error.
I also noticed that in the GX Control section, the RAM consumption numbers, for some reason, become negative...
I tried to see if this happened on Twitch or Instagram and no, the RAM is properly managed on other websites.
Screenshot: