Le film est un montage de plus de 470 extraits de films américains, allant de 1903 (Le Vol du grand rapide) jusqu'à 1985 (Rocky IV), en passant par La Panthère rose, des films d'horreur, et des célèbres comédies musicales comme West Side Story ou My Fair Lady.
Filming Othello begins with Welles standing behind a moviola. He directly addresses the camera and announces: "This is to be a conversation, certainly not anything so formal as a lecture, and what we're going to talk about is Othello, Shakespeare's play and the film I made of it." Welles initially conducts a monologue where he recalls the events that lead up to the creation of Othello and some of the problems that plagued the production. As the film progresses, he switches to a conversation in a restaurant between himself and two of the film’s co-stars, Micheal MacLiammoir (who played Iago) and Hilton Edwards (who played Brabantio). The three men talk at length about the making of Othello. Welles then resumes his monologue from his position behind the moviola. He then runs footage on the moviola of a question and answer session he conducted during a 1977 screening of Othello in Boston. Welles concludes the film in his position as a monologuist, proclaiming: "There are too many regrets, there are too many things I wish I could have done over again. If it wasn't a memory, if it was a project for the future, talking about Othello would have been nothing but delight. After all, promises are more fun than explanations. In all my heart, I wish that I wasn't looking back on Othello, but looking forward to it. That Othello would be one hell of a picture. Goodnight.
Troisième volet de "Il était une fois Hollywood", "That's Entertainment III" nous propose un nouveau panorama de l'age d'or de la MGM mais aussi des chutes rarissimes, des séquences coupées lors de la sortie des films et des essais d'autres stars que celles qui furent finalement choisies.
In Citizen Kane, Welles plays Charles Foster Kane, whose fictional life partially mirrors that of Hearst's. However, Chicago inventor and utilities magnate Samuel Insull, Chicago Tribune publisher Robert R. McCormick, and even Welles's own life were used in creating Kane.