Collocations for documentary - noun

dramatized | fly-on-the-wall | film, radio, television/TV | controversial | science, wildlife, etc. | half-hour, hour-long, forty-minute, etc.

make
She has made a television documentary on poverty in our cities.

film | show | see, watch

feature, film, programme, series

in a/the ~
There were some interesting interviews in the documentary.

~ about/on
a documentary about identical twins