In 1947 a balloon, part of the US Project Mogul, crashed some miles north of the town of Roswell. To cover up the secret project to detect Russian A-bomb testing, the purpose behind Project Mogul, they went with a cover story about UFO's. Almost immediately they realized the mistake as that only increased the attention so they came up with another smoke screen, albeit a more plausible one, that it was a weather balloon. Nearly 75 years later the town of Roswell is pretty much a UFO theme park.
My guess is that the US Navy is testing some new kit and they want people that might see something to jump to the conclusion they'd prefer.
In the video's released months ago one of them was pretty clearly a bird on a thermal camera and another video appeared to be a fighter plane distant enough that the image was barely identifiable. The US has had cameras in planes for a century and thermal cameras for 50 years, give-or-take, and they have people trained and qualified to analyze that footage. I find it unlikely in the extreme that they are unaware of what it is in those clips.
So, cover story!
Brian