YouTube and Flickr functionality

I can not figure out how the 'Add to YouTube' 'Add to Flickr' links are supposed to work? Is there supposed to be an option on the Theme's Settings page? or on user profile's page? Also, when I hover over the link, I get the following on my site: ... see the double forward-slash? I can fix this in the template file easily, but just thought I'd give you the head's up.