In order to actually function, the series Jury Duty/Jury Duty Presents: Company Retreat sets up the idea that a crew is shooting a documentary – which not only explains the presence of cameras to the unknowing "hero," but also opens the door to them self-recording and share their thoughts on everything that's going on. That being said, the whole experiment wouldn't be nearly as fun/interesting if the show's subject was aware of constantly being filmed, and the lengths taken for the camerapeople to stay hidden during the shoot were definitely impressive.
