It’s not bigger and longer than _Star Wars,_ but it is more uncut: “Death of the Author [Psycho Shower Scene RECON]” by Dick Whyte. This, somewhat like the later famous Star Wars video, is a “reconstruction of Alfred Hitchcock’s famous shower scene from Psycho using amateur YouTube remakes.” 57 of them.
If you got that and you’re ready to increase the avant-garde, see also “John Cage – 4’33” [May ’68 Comeback Special RECON]” and “Andy Warhols Eat A Hamburger [38 Scenes From YouTube RECON].” All from 2010, but recalled here for your enjoyment.