SO it appears it is user henkster, here on BCT, that reported the puzzle. He commented on this thread earlier. Syaing it was a sham and unsolvable and n\bla bla bla ... He just deleted the is comment.
This post?
http://loyce.club/archive/posts/5244/52446558.htmlFor what it's worth: I appreciate what you're trying to do, and I really like Bitcoin puzzles. I found it too late though, so I hope you can sort it out with Youtube.