Websites not being blocked

Hello,

I need some help as Norton family is not longer blocking some websites. I have re-installed family but this has not worked. Some websites are still being blocked but the major one I wish to block is you tube. The URL's are in the "specific websites to block" tab on the "web supervision" page but this is having no effect. I think the issue might be that family is only blocking the HTTP site and not the HTTPS site. How do I block the HTTPS site?

Many thanks

Paul