On youtube you can find all sorts of films which have been "Premade." This means going back through hours of archive footage and recreating a trailer for the film if it had been made decades ago. The best example of this I've seen so far is Up! premade by Whoiseyevan:
Here are some of the ingrediants mixed into this trailer:
Guess Who's Coming to Dinner, *batteries not included, The Red Balloon, Superman, The Wizard of Oz, The Muppet Movie, Follow Me Boys, Mackenna's Gold, Benji, A Boy and His Dog, Mysterious Island, The Doberman Gang, The Alvin Show, Posse, One of Our Dinosaurs is Missing, The Island at the Top of the World, Zeppellin, Stephen King's It, Hollywood Hotel, Jonny Quest, Peter Pan's Flight, Habanera from Carmen, Always
Anyway, enjoy! And if you want more, search for Premakes on youtube.