One is seeing a non-realistic representation of moral truths here, not a full realistic reconstruction of the past. Weber includes several trick shots in the film. These are time lapse exposures. The camera records a scene from a fixed point of view. It is stopped.
Different actors are put in front of it, then the shot is resumed.
There is other trick photography in the film as well, notably the half transparent photography of Truth, who usually looks like a film ghost. One imagines such double exposures were common.