Filmed two spherical metal objects fly by, both following the same flight path.

I was filming the sunset using a drone at approximately 200 feet elevation near Moab, Utah. From the ground I saw what appeared to be a large metal basketball fly past my drone, I turned to watch it fly over the horizon within a few seconds, noting this as the setting sun made the object reflect as if metal as it flew away from me. Upon reviewing my video I noticed I captured two of these objects, the second following a little lower in elevation but at the same speed and trajectory as the first. Both seem to emerge from over rocks on the horizon and fly past the camera. I was filming in 4K resolution at 30fps, so I could slow the footage down to 24fps and before the objects get too close the spherical shape and reflections can be seen. Once they get too close the motion blur gets too intense as they pass by, showcasing the speed.
I have included one of these objects in a detailed video I’ve attached, the second object is not showcased in this attached video but looks similar, just further away. I would be happy to provide the unedited original file.