That is the correct spelling of "documentary" (designed to show facts, or a nonfiction video presentation).
Documentary can be an adjective and a noun.
A documentary novel is a nonfiction book usually about a specific person or place.
Factual writing is nonfiction.
Take off the -y and add -ies: documentaries.
Document
a documentary is spelled 'un documentaire' in French.
The similar word in Spanish is documentario.
The historic spelling is "travelogue" (travel documentary).The US spelling is also rarely "travelog" (as with dialogue/dialog)
There are several different types of documentaries. Some of these are, expository documentary, observational documentary, and the observational documentary.
There is currently no documentary about Usher
The Donner Party - documentary - was created in 1992.
Documentary can be an adjective and a noun.
A documentary is a film where you learn about a person or thing
documentary bill of exchange
Documentary Center was created in 1990.
RT Documentary was created in 2011.
Pageant - documentary - was created in 2008.