Not meaning to piss on the parade ( yes I am ) most of the videos character comes from the editing. I'm guessing they had to record about an hours worth of them two waffling to get the bits they got. And even then, the bits I found funniest ( Bonnars facial expressions as Forrest speaks ) we're probably from a completely different bit of the conversation.
All in all... rubbish.
Today, you may call me Mr Grumpy.