I think you are right: real short film but I would be surprised Edgar Maddison Welch played any role in it.
It's seems like it is a school project movie. Google Translation:
Some Thing About Pizza 'is a film that must come if the Quentin Tarantino and Alfred Hitchcock's Opptrag having an ad for Pizza to do. The girl comes home hungry, but his brother was-oh startle the whole eating pizza downward. From that moment onwards there was only something for her: Revenge of the Pizz '... railways is the film as a function for a film class at the Lycee Technique des Arts et Métiers; which was as follows: Connect a cult Filmszene with advertising for a pizza. The young director Olivier Koos was not asked and morning a half dozen cult scenes reinterpretéiert. The film was produced with the a.s.b.l. Pyramid Pictures which are determined to finish off young talents to promote reform and other topics like that of a Fund sponsored. "It must be nice vegiessen, as the president of the association, Patrick VEDIE that cinema times especially have fun doing, the Odyssey was just the story of a guy without GPS...