The script is the possibly the most fundamental aspect of film production, right after the creation of the story. The script concertizes the story, makes it more understandable from an implementation viewpoint. That is, a story can be shown in any number of ways, but with a script, the manner the story will be presented has become more specific. This skill is not something a person can just learn overnight.
The only way to learn the art and craft of writing a script for a film or video is via screenwriting schools. These schools immerse the participant, or would-be-screenwriter, into the art of the movie. The student’s skill is molded into a creative tool whose juices flow with the story, and create dialogue and backdrop description to emphasize the dialog and enhance the story.
With a story taking shape and form in the character’s dialogues, the movie starts to take shape. The discipline for keeping the script true to the story for countless revisions is one of the most important things a student can learn in a screenwriting school.