"This content is blocked. Contact the site owner to fix the issue."
https://mcdiscontinued.miraheze.org/wiki/Video:Beta_1.0_01_Spam_Drop_Duplication
"This content is blocked. Contact the site owner to fix the issue."
https://mcdiscontinued.miraheze.org/wiki/Video:Beta_1.0_01_Spam_Drop_Duplication
The extension uses Youtube.com, and not youtube-nocookie.com, so that might be the issue.