Cinematic previews, often referred to as trailers, are short video clips designed to promote upcoming films. They typically showcase key scenes, characters, and the overall tone of the movie, enticing audiences to watch the full feature. Previews are usually released several months before a film's premiere and can be found in theaters, on television, and online. These previews serve as a marketing tool for studios, helping to generate buzz and anticipation among potential viewers. They often highlight notable elements such as the cast, including actors like Tom Hanks or Scarlett Johansson, and the film's genre, whether it be action, drama, or comedy.