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Michael S. Deak, a movie makeup artist, has made several trailers for fake horror movies from the 1950s and 60s, such as Attack of the Brain Leeches. His YouTube channel is filled with similar works. Most noteworthy among them is a trailer for Gli Uccisori Del 'Idiota, a really well-made imitation of 60s-era Italian spy movies.
YouTube Channel via Boing Boing