We saw multiple flying objects moving in a synchronized way back and forth, staying still, and moving at incredible speed out of sight.

This morning at about 11:20 AM, my daughters and I saw about 20 very large, low flying, shiny, white objects moving silently back and forth in a synchronized formation above us. My eldest daughter (13yr.) saw them first, for about 15 seconds, before she ran to tell me. They were flying in a completely unfamiliar fashion. The sky was clear and it was sunny, so we had a sharp view of them. The objects wove around each other, sometimes holding a position and hovering for a few seconds before rearranging. They also circled around and followed each other at a steady speed. After about two minutes they turned west and then north. I quickly grabbed my phone to take a picture and ran outside. Unfortunately, by the time I had my camera on, the objects had reached a much higher altitude and started to leave. They flew north so fast that we lost sight of them within seconds. I just caught them disappearing above our spruce trees. We can't tell if it was a trick of the light, but some appeared to be spheres, some ovals, and one may even have been disc-shaped. My youngest daughter (9 yr.) believes she saw some of the objects break off and head east, stop, and then vanish in the same direction. The event lasted for 3 minutes at the most. We regret not being able to capture images of the objects more closely and can only send the attached video and 4 photos. If you move the video slowly right in the beginning you can just make out the white objects right above the tree, disappearing in the distance.