This is a fine documentary about Randi, a true story told in an interesting way. But is it cinema, or art, just because it is shown in a cinema? I say, no. this type of "film" is a form of journalism, not art. There are however documentaries by great artists, Chris Marker, Agnes Varda, Michael Glawogger whose work transcends the traditional format. They (mostly) started differently and evolved into documentary films.