In cinema, a making-of or behind-the-scenes is a documentary featuring the production of a film. It describes how the scenes in a movie were created. Some trolls took footage from the behind-the-scenes of various space movies and present them to flat-Earthers as though it is how space agencies “faked” their videos.
Flat-Earthers fail to realize that these footage were just behind-the-scenes of space movies and unrelated to the actual space footage from space agencies. These spread as hoaxes in flat-Earth circles.
Some of these movies include The Martian, Gravity, Interstellar, Ad Astra, First Man, and Apollo 13.
To the people that first cut the footage, it is impossible to be unaware that these are the behind-the-scenes of various movies, and therefore, it is impossible it was just an honest mistake. These people did that in bad faith and deliberately spread the footage as hoaxes.
References
- Making-of – Wikipedia