Exit through the Gift Shop is a sort of meta-documentary, directed by the well-known British street artist Banksy. The subject of the film, Thierry Guetta, was at one point a would-be documentarian of the street art movement, who later rebranded as a street artist himself under the name Mr. Brainwash. About two-thirds of the film’s footage was taken by Guetta himself, who was a prolific videographer to the point of obsession, described as carrying a camera absolutely everywhere and having thousands of hours of taped footage stowed in boxes at…