Well, … there was a time that videos such as these seemed a whole lot more impressive to me. But time and much consideration aided by the multitude of such VT's on YT … I generally see them as nothing but clips of nocturnal bird flight! … As usual, I could be wrong. But i'm pretty convinced that this is the correct identity for most of such offerings... take a look at a few examples and tell me if you think otherwise... Cheers Buddy.