I’ve seen such a pattern high over grape fields in Napa Sonoma and it was spooky at first but turned out to be a HUGE “flock” of starlings (birds) flying super high in the sky, in such a “wormy” type pattern, they would then spin into a tornado shape and come down to attack (eat) grapes.
Agreed...these birds are all over the place in East Tennessee right now...they swarm like that in the evening.
The comments over at YouTube are insane...someone said it looks ‘alive’...that’s because it is a flock of birds. Gads.