What does the abbreviation "ECU" refer to in cinematography?

In cinematography, the abbreviation "ECU" stands for "Extreme Close Up." This shot type is used to focus on a very small detail of the subject, such as an actor's eyes or a specific part of an object. The intention behind using an extreme close-up is to create an intimate or emotionally charged effect, drawing the viewer's attention to the minute details that may convey significant meaning within the context of the scene.

The other terms provided are not standard terminology in cinematography. "Extended Cut Up" and "Everyday Camera Use" do not refer to any recognized shot types or techniques, while "Engaged Capture Unit" is not a known concept in the context of cinematography. Thus, the extreme close-up is well established and widely understood in film and video production as a key method for enhancing storytelling through visual focus.