A documentary is a piece of non-fictional media, often screened in movie theaters. In the movie review series On Cinema there is a long-running debate if documentaries are true movies or not. Frequent guest Gregg Turkington considers them poorly made and uninteresting movies at best,^[1] and doesn't even consider them movies at worst.^[2] He usually rates them poorly, if at all. Turkington posits that if a film tells a historical story using actors, it is a dramatization, and therefore not a documentary,^[3] and thus is a real movie. Inversely, not using actors then makes the film a documentary, and not a movie.

Turkington has claimed that the documentary Trinity & Beyond may have used faked footage in its production.^[1]

Similar to documentaries, concert movies do not have actors, instead filming actual events. While Heidecker and his girlfriend Ayaka Ohwaki highly rated One Direction: This is Us, having seen it with Tim's niece, it was given 0 bags of popcorn by Turkington, who felt that it shouldn't have been rated on the show.^[4]