User blog comment:Kirkburn/Technical Update: June 4, 2013/@comment-4981281-20130611111048/@comment-3279487-20130611114453

My point was that you don't upload anything, you just create a file page. The video is uploaded once on the hosting site, the file page is just a link, hence I don't even see the copyright issue, since you may simply redirect the license to the original video.