The phrase "a different documentary" is correct and usable in written English.
You can use it when referring to a documentary that is not the same as one previously mentioned or known.
Example: "After watching the first film, I decided to explore a different documentary that focused on climate change."
Alternatives: "another documentary" or "an alternative documentary".
And what could have been a 10-minute addendum to "Comandante" became instead "Looking for Fidel," a different documentary altogether.
Mr. Bocharov stumbled upon Shiryaev's groundbreaking films after he began work in 1989 on a different documentary, "Apostles of the Russian Ballet".
He apparently had other media ideas: he told a Tennessee newspaper in 2006 that he had produced a tornado-chasing documentary and was seeking a TV distributor, and two years later, according to an entry in an academic journal, he was producing a different documentary about electromagnetic fields in storms.
Work on that triptych of theatre pieces, Hindenburg, Bikini and Dolly, each of them dealing in a different documentary way with 20th-century technological advances and their consequences for society, as well as on his previous collaboration with Korot, The Cave, had dominated Reich's output for more than a decade from the early 1990s.
The two met while Perlmutt was working on a different documentary project in Cuba.
Ari Mostov, a survivor from the University of Southern California, actually worked on a different documentary about campus rape, called "It Happens Here".
Reminiscent of her 2006 investigation into the life of Florence Broadhurst, Armstrong decorates her sleuthing to the hilt, with party-like visual panache and a cocktail of different documentary techniques.
It essentially top and tails six different documentary stories with a narrative (sadly never fully exploited) featuring Pete Postlethwaite as an elderly man in 2055 in a tower with a database of documentary and journalistic clippings, everyone's bank details and some pickled mammals in glass cages.
Clearly a commendable BBC recycling exercise consisting of the scrag ends of four different documentary strands, it was more confusing than the numbers game on Countdown.
When the different documentary sources I consulted gave different versions of the same event, I favoured the one that seemed most plausible to me as a novelist.
The real Patsy Ramsey can be seen giving her warning in two very different documentaries, one on MSNBC and another on A&E.
