Documentary comedy is a form of comedy. The comic material used is presented in documentary style—usually, a report on a particular theme or issue—and with the same investigation and reporting methods used to gather the material.
Well-known documentary comics include Dave Gorman, Danny Wallace, Tony Hawks, Alex Horne and Mark Steel.
It is not to be confused with mockumentary, a form of spoof in which a documentary is played "straight" but based on fictitious material.
References
Documentary comedy Wikipedia(Text) CC BY-SA