This reminds me of a similar discussion regarding Youtube and movie scenes, behind the scenes footage, or soundtrack music, and to an extension fan made videos. Since in the before times such materials would be found on the film's official DVDs/Blu-Rays and soundtrack album, the discussion was about if uploading those materials and/or editing them to make fan creative content would fall under regarding both ethics and legal issues since the sharing of the film contents via Youtube makes it free for watching or listening instead of having to buy the film or soundtraack to have access.