I think this is the movie about which DN informed me a while back: Fetih 1453 (wiki). It was just released this month?

official website

Apparently a movie glorifying the Ottoman conquest of the imperial city.

An Orthodox alternative?
From 2010: The text of the film “The fall of an empire—the Lesson of Byzantium”
A Byzantine Warning.
On the new documentary film, The Fall of an Empire—the Lesson of Byzantium

An Interview with Archimandrite Tikhon Shevkunov on “The Fall of an Empire: The Lesson of Byzantium”