Hey, this issue is not being caused by GoodTube. It's something that Youtube have been doing recently to users when they detect they're using an adblocker.

So far GoodTube is undetectable, so most likely you've got something else enabled which is causing this (such as uBlock Origin). Or had it enabled previously and it's left traces behind in your cookies and cache (in which cause it will trigger detection even when it's been disabled).

Please note that setting the slider on uBlock Origin to the lowest setting won't work, you've got to fully disable it.

Can you try fully disbling all other extensions, clear your cookies and cache, and then test with only GoodTube enabled? I think that will resolve your issue.

From there you can then turn your other extensions back on one at a time until you find the cause of the problem.

Hope that helps!