In the present, faking something like this convincingly is probably more expensive than just passing off stock footage as the real thing. If they are motivated

In the present, faking something like this convincingly is probably more expensive than just passing off stock footage as the real thing. If they are motivated by laziness/greed, I wouldn't expect them to cough up the resources for an outright 'hollywood fx' style fabrication. (When the stakes are higher and spy agencies are involved... who knows.)