Today Show: pilot shares video of strange UFO sightings across the US
youtube.com
youtube.com
https://www.nasa.gov/feature/nasa-announces-unidentified-aer...
Apparently there is no single explanation, the source can be airborne clutter (balloons, plastic bags, civilian drones), natural atmospheric phenomena and classified programs developed by the United States, Russia, China or another nation or non-governmental entity.
It would be really lame if it would be aliens, like they are trying to hide from us, they are just really bad at it. I would expect better.