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Would the actions of Jack Black and Mos Def in "Be Kind Rewind" really violate copyright infringement? - gondry jack black

I am a little confused because in the movie, some lawyers come into the store, Mr. Fletcher confiscate and destroy / all "Sweded" films Jack Black and Mos Deb on DID (sketches on popular movies, but in reality, all completely original, ) with the talents and ideas, and production.

Had this happened in real life, that lawyers were actually able to do?

I think what confuses me is that the movie Be Kind Rewind, "seems even in violation of copyright law of the dozens of films will be if the answer is yes. So, how to travel by Michel Gondry for? (Or is it the studio Be Kind Rewind, the permission to all of these films is described produced?)