What Is a Dead Man Switch?

A dead man switch is the idea that there's an action you as a person need to perform on a regular basis in order to prevent something from automatically occurring. Mike: Can you please explain what level of peculiarity that is? "I don't fully understand what's going on here," he says when Emily asks him about his vlog. 'It's a dead man switch, Mike. I don't understand what I need to explain'