noun. A fictional movie or television program that is a parody made in the style of a factual documentary.

noun. A television programme/program or movie presented as if it were a documentary but that is not factual and often a parody or satire.

"A fresh, ironic take on the insanity of suicide bombing but also the reality of a fractured society and the frustration of disconnected people ... in mockumentary format."

false documentary  fictional documentary