The phrase "fascinating documentary" means a very interesting and captivating film that tells the true story about a specific subject or event. Full definition
These actors utilize their vocal prowess to serve as the backbone for fascinating documentary films. (decider.com)
A somewhat choppy but unavoidably fascinating documentary about five major Hollywood directors. (metacritic.com)
The cult of Stanley Kubrick is taken to a new extreme with Filmworker, director Tony Zierra's fascinating documentary portrait of Leon Vitali, a classically trained British actor who gave up a promising career in front of the camera to serve at the feet of the master. (scotsman.com)