These are not merely clouds. They are mysterious cloud creatures that grow, move and morph in the sky. They infect each other, absorb, and merge with each other and with clouds. I believe either they evolve from chemtrails and infect real clouds which brings them to life. They don't usually take the form of identifiable creatures, but sometimes they do. They more resemble microscopic creatures. None of the clips are time lapses.
Vilnius Media
Audio:
"Controlled Chaos" by Kevin MacLeod - Incompetech
