Just today I was watching a movie in which Buster Keaton had a blackface.
If you are referring to the face Buster has in the freeze frame of the Video .. he is a made up as a MONKEY in that scene .... that is not "blackface"
a wise man once said "If someone doesn't want responses to his/her posts, then s/he shouldn't post them. If someone wants specific users to not respond...well, that's too bad." (link)
