There are like 10 feature-length flat earth "documentaries" on Youtube. If this is a psyop, it seems to be going pretty well.
IMPOSSIBALL 🌎 Flat Earth Documentary (2017)
https://www.youtube.com/watch?v=UbYtkrTquXE
The Flat Earth Conspiracy Documentary
https://www.youtube.com/watch?v=kFjG4jpUhQI
Under The Dome - Full Documentary
https://www.youtube.com/watch?v=fk4YqPtvJao
The Best Flat Earth Documentary