This document discusses different aspects of time that are relevant to video and film. It defines three types of time: clock time (objective time), psychological time (subjective time), and biological time. It states that when structuring the four-dimensional field for video and film, the primary interests are objective and subjective time. It describes how directors can control objective and subjective time to influence the pace and tempo of a film. Editing allows filmmakers to change the time order and construct their own timeline. Examples like flashforwards and instant replays are given to illustrate manipulating time in edited video and film. Specific movies are referenced as examples that play with the concept of time.