Here are some pretty dramatic UFO flights caught on a night vision cam in Melbourne, Australia. The author says these behave way differently than satellites, which implies they're used to videoing the sky - could these be insects, would we be able to tell the difference? Perhaps the size of the objects could be determined with more context.
YouTube description: Filmed all these objects in a 2 hour period. Filmed many satellites but did not post. These objects have unusual flight patterns.