I have written elsewhere that
fake documentaries are "fiction films that make use of (copy, mock, mimic, gimmick) documentary style and therefore acquire its associated content (the moral and social) and associated feelings (belief, trust, authenticity) to create a documentary experience defined by their antithesis, self-conscious distance."
[cit]
Parody, "a literary or musical work in which the style of an author or work is closely imitated for comic effect or in ridicule,"
[cit] is also a key tactic of postmodernism "because it foregrounds quotation and self-referentiality."
[cit]