He didn't say facial expressions. He said expressions of emotion which is something a bit different. I think the title on the youtube clip miss characterizes to a degree that comes off as unfair and makes whoever posted and titled the clip as dishonest.
He may well be a crummy judge. I don't know, but he didn't ban "facial expressions".
1) The exact quote is posted in the video descrip; he says "any" form of emotional expression is banned. Read it. Or post it, if you want to do some of my work for me.
2) After observing this judge, do you really believe a person could sit in the audience their with their mouth wide open, and not be kicked out?