They are NO UFOs from outer space there is no planet with in 45 light years that may even hold life.
Remember the jump jet it showed in in many places before it was made public and Black Bird.
No one was put at risk.
Actually they are unidentified according to the USN. As to whether they come from outer space? Is is possible, yes. I would wager if you want to go the non-earthling route the critters would be inter-dimensional more than anything.
All that being said if they are experimental craft they have to have anti-gravity capabilities to do the maneuvers they were doing. This totally destroys Boeing/Airbus etc... and other conventional airline and space technology, making it akin to the horse and buggy and a top of the line Porsche. If they are make public why would you spend another penny on a 767, F35 or SLS booster?