“You got to see this guy” is a turn of phrase used by many and doesn’t always mean what you exclusively seem to think it means. And the You Tube video simply shows him imitating a flustered individual. If you want to see more into it because you don’t like Trump, so be it.
I don’t like him as a candidate, but I’m not reading any more into it because of that. It’s no more ‘coincidental’ than Obama’s ‘my muslim faith’ Freudian slip was.
Generally true. However, he precedes it by saying, "That poor guy...."
I'm not exactly stretching things to infer he's familiar with the man and his condition.