There is a significant difference between the title and what's in the poster image. One commenter on the thread pointed to the Casablanca Wikipedia page. The "

There is a significant difference between the title and what's in the poster image. One commenter on the thread pointed to the Casablanca Wikipedia page. The "poster" image for Casablanca has an alt text: "Black-and-white film screenshot with the title of the film in fancy font. Below it is the text "A Warner Bros. - First National Picture". In the background is a crowded nightclub filled with many people." If you imagine a movie being embedded in a webpage, that might be the alt text for the poster image whereas the title might be "Casablanca".