The ‘Which hand is the coin in trick‘ can be done in two ways. Option one is reading body language, as explained by Chris Ramsay in video one. Option two is using mind control or hypnotic suggestion through conversational hypnosis, also called embedded commands. This is how I think Timon Krause fools Penn and Teller on Fool Us. I also provide links to courses which will teach you the power of mind control and conversational hypnosis below.