Movies are an important part of this story. and all of the films it mentions are real. Harold Lloyd is one of the biggest stars of early America cinema and was known for his comedic performances. The story references his most famous film here:
Safety Last.
Safety Last was especially memorable for Hugo because of his love for clocks, which he associates with his father. Like other technologies in the book, movies were a relatively new invention, which only came around at the very end of the 19th century.