Towards the end of that first video https://www.youtube.com/watch?v=M91AYp3_x5k&feature=youtu.be... he definitely gets struck by the arc, which makes me question what the point of the metal suit is. Is it just for show, to make it look more dangerous?
My understanding is that the frequency is such that it doesn't interact with anything in the human body neither the heart nor the nervous system but I would expect that an arc to the eye would cause some amount of UV damage.