Hi Wut,
I agree with the turtle look. This is a basic video on a very old trick that does work excellently with straight portraits. The problem that Peter has was he was showing us with to short a lens. If he had extended it to 150-200mm the head and shoulders would compress taking away the turtle look but still pulling the skin back. If the video was reshot I would use a longer focal length to truly show off what a difference a forehead push can make.
Take care,
Jonathan