Will using Family Safety to block Youtube also block Youtube links on other sites from loading?

I am trying to block a child from accessing Youtube directly. My concern is that she needs to be able to watch Youtube links for school.   The school has the content on one of their pages. I understand that adding youtube.com to the blocked list will prevent the child from having access to that direct page...but will it block all content as well, or will the child be able to watch a video if given a link to it?