Flock formation of unidentified craft, appearing as blue strobing lights

First spotted four lights coming across the horizon in a diamond formation.  These were followed by several more in a flock.  
The lights appeared far away, behaving like fireflies, but it was obvious they were MUCH larger.  Definitely not airplanes (there was a plane elsewhere in the sky at the same time and it was nothing similar in appearance or behavior).  
The lights flocked across the sky slowly, glowing off and on like fireflies.  The lights were slightly bluish in color.  
Spotted from the smoking patio of The Milestone Club on Tuckaseegee ((sic.  Tuskegee??)) Dr.
Did an internet search to see if there were any other reports of this sighting, found this video of an almost identical sighting also in Charlotte from 10/15/16: 
https://youtu.be/qxLEnqsUYS4