LLVM 2013-2014 Dev Meeting videos

Hello
Excuse me if this is a wrong mailing list for this question, but I do not know a right one )
Issue: two playlists on LLVM Channel on Youtube became private (2013 and 2014 LLVM Dev Meeting)
https://www.youtube.com/playlist?list=PL_R5A0lGi1AA4GNONa4vof63jalYbs-MG
And on https://llvm.org/devmtg/2013-11/ there are no such videos also
(e.g. https://llvm.org/devmtg/2013-11/videos/Lattner-LLVM%20Early%20Days-720.mov returns 404)
Is it possible to resurrect these videos?