"Cinematic" has been a buzz word lately, and in a nutshell, that's how we say a subject has a refined look ike in the movies. This video will not only teach you the basics, but also give you extra tips on lighting the set environment.
One of the most important aspects of lighting a face is where you place the key light. The author of the video explains that this is not always the source that illuminates the face. It could be placed behind the subject as well. This is the light that creates the tone of the scene. Although there are no strict rules on where and when to use certain types of light, there is a principle that having less shadows conveys a more cheerful and positive mood, while more contrast is usually associated with thrillers, drama, and action stories. The relation between the intensity of the key and fill light (the light that illuminates the darker portion of the subject) can be separated into two basic groups: "high key" or "low key." This is an important note from the author of the video, because I've seen overexposed images defined as "high key," which is not correct.
Even if you don't shoot moving pictures, such information can be helpful to any photographer out there. Light is light, and learning how to shape can be helpful for both stills and video.