Stock footage is of great use to filmmakers as it is far cheaper than shooting a needed scene. Stock footage can also be used to integrate news footage or notable figures into a film. For instance, the Academy Award-winning film Forrest Gump used stock footage extensively, modified with computer generated imagery to portray the lead character meeting historic figures such as John F. Kennedy, Richard Nixon, and John Lennon. Most of the Godzilla films have stock footage. Through the use of stock footage from Superman: The Movie and Superman 2, Marlon Brando was able to reprise his role as Jor-El in the 2006 film Superman Returns after his death. It is possible to find anything you want, using popular libraries or bigger portals which contain hundreds of libraries (
http://www.stockfootageonline.com ) Funny stock footage and celebrity stock footage are available in unlimited quantity