The military satellite that footage was from wasn’t even launched (on 5/22/14) till after the plane went missing (on 3/8/14).
https://www.nasaspaceflight.com/2014/05/ula-atlas-v-nrol-33-launch/
Discussion
It was said to be an MQ-1C Gray Eagle drone, which I don't see mentioned there. The stereoscopic footage from 2 different angles matches the capabilities of that drone exactly. I believe there is almost zero chance someone knew all these details and made such a good fake in such a short time.
That drone can’t fly above the plane to capture the footage