Big movie companies like Disney, Pixar, Universal, ect create a couple movies each a few hours long each year. This means their video time to real time ratio is a very tiny number I estimate at around 0.001, and that's with all their animators. Even at that rate, their videos have
many flaws which are very easy to find and wound easily give it away as a fake if it were not marketed as such.
On the other hand, NASA streams
a live feed from the ISS, releases countless photos and videos from space, and even releases terabytes of raw data from space missions. This means that their video time to real time ratio is actually greater then one, I estimate it to be at least 1.5. This means that NASA produces about 1,500 times more video then any movie company, and at the same time make it look convincing and real enough to convince the vast majority of the general public. NASA also opens events like launches to the public so people can come and watch it.
So flat earthers expect me to believe that NASA is able to fake 1,500 times more video then movie companies that's more convincing then movies? As if.