UFOs or Satellites?

UFOs or Satellites?
Are these UAPs or satellites? Lights moving in a straight line. Tight formation. It almost looked like a vertical radio tower at first. I put the camera down to watch. But they suddenly and very quickly appeared to fly straight up and the lights dimmed to blend in with the night sky. 

I wish I would have kept the video going. My adrenaline was pumping and I wanted to see what they’d do. 

Time: ~18:45 CST
Location: Aurora, IL