I don't know what those things are, all I know is that in my parents isolated village 2 years ago there was a day that at noon about a dozen of those "contrails" or "chemtrails" apeared within 30-45 minutes all comining from an angle of about 120 degrees, I found it so weird that I started taking pictures and captured a video. Air traffic is highly unlikely if not imposible because of the location of the village.

I would not completly rule out weather intervention, nearby on one side there are large argicultural areas and on the other side the area is somewhat mountainous.