I have a short video of craft leaving scene of sighting

Noticed green light darting back and forth I pulled out phone but didn’t switch to video however when picture was taken I got a “live” quick clip of it leaving where it was conducting activity I have two other experiences with this craft one before and one after plus a startling experience involving multiple craft. I am also pretty sure that once in the air they mimic airplanes by flashing a light which was confirmed the next time I saw it which I also have video of. I have no video of the first sighting but not only was I closest to object the third time I also had someone with me who saw it take off the same time I did. It made no sound had green light around the outside of it but once in the air it blinked white or clear light that we could see came from under the craft confirming what I suspected about mimicking airplanes.