Everything these days is about legalities. Even homework is about the legalities. Mainly plagiarizing. So one such sights as Brain-Terminal and some of these vlogs that I've discovered. There are some legalities to look at.
From Ryanne's Video Blog at the bottom is a link to a site talking about Creative Commons Licenses. The page is very simple as you'll see but basically this one is free to distribute, copy and display a work however they cannot use it for any commercial purposes. They must credit the creator of the work and they may not make any alterations of any kind. Of course one has to get permission to do any of these things.
Here's the link to the site that has explained it perfectly.
Creative Commons Deed
Creative Commons Legal Code (The full license)
Creative Commons Homepage