Did you mean YouTube Live: Charlie the Unicorn?
YouTube Live Promo: Charlie the Unicorn is a 42-second long video created by FilmCow as a promotion for YouTube Live.
Charlie is hanging from a rope whilst the blue and pink unicorns tell him that they only have 30 seconds to defuse a bomb. Charlie questions how the other two got him into doing this and tells them to calm down, at which point Blue reveals that they are sitting on a thousand pounds of nitro-glycerine.
Charlie finally gets the code but the other unicorns reveal that they are being attacked by Giant Seagulls.
A voice then states that the exciting conclusion will not be seen at YouTube live, but that something else will and that the viewer should watch it.