[y-c-o-m-b]

I think it's a mixture of truly unknown things, bugs, birds, and drones.

This one looks very much like birds to me: https://www.war.gov/UFO/?releaseDate=Release+02#DOW-UAP-PR05...

The one is definitely interesting though: https://www.war.gov/UFO/?releaseDate=Release+02#DOW-UAP-PR05...

This looks like an insect perhaps: https://www.war.gov/UFO/?releaseDate=Release+02#DOW-UAP-PR05...

Possibly drone: https://www.war.gov/UFO/?releaseDate=Release+02#DOW-UAP-PR05...