Blinking lights flying in formation 2 hovering in place and a 3rd flying erratically near them

My video size excceds the maximum I can upload here but I have video of my sighting here:
https://youtu.be/uJLVgo69xOw
Video is in 1080p, it was dark and I was zoomed in quite far but I suggest being sure to view it in 1080p. At lower resolutions its hard to make out details.
I noticed what I at first thought were 2 airplanes flying in formation flying away from my position, heading South West. They were each blinking red and white lights and they began to make erratic, unpredictable movements (speeding up and slowing down quickly and flying over top of one another). The red and white lights on each of the objects then began to blink in unison, that's when I decided to start filming them. They were quite a distance away at that point and the 2 original objects had stopped blinking red and only seemed to be blinking white lights. After a short time, a 3rd blinking light appeared to the bottom left of one of the original lights. It flew towards that object and made a very close, fast maneuver around the right side of it. It seemed to pick up speed after this and climbed at a steep angle then made a hard right turn and flew away from the first 2 objects.