Details of Project 1794:
https://www.youtube.com/watch?v=aFoSYntvFVk
Avrocar - Footage of the Air Force's Real Flying Saucer:
https://www.youtube.com/watch?v=iLaFQbatAx8
Photo of the Avrocar:
https://media.defense.gov/2021/Jul/01/2002755255/-1/-1/0/210621-F-AU145-1070.JPG
This all points to the Stargate series as a documentary.