I was taking a video of the flyover and during review I noticed several shinny objects mimicking the aircrafts

While watching Leavenworth Veterans Day parade, approximately 11:00am the parade halted to allow a flyover to celebrate Veterans day. I was taking a video and didn't notice anything strange until I reviewed the videos. On closer look I noticed that at least nine UFO's were moving in and out of sight at incredible speeds. As the flyover was close to being centered above the parade area I noticed the UFO's mimicking the aircraft formation with one of them being steady in an over watch position. The time between movements was just seconds. The speed at which they moved up and down had to generate high G's, not only that but they seemed to stop so sudden that it must have been unmanned. I don't think that anyone could have piloted an aircraft that would have traveled that fast and stopped so sudden. The UFO's also seemed to hover while the aircrafts passed by. They made several formations, a "V" formation, a three by three formation and a four point square formation. Upon reviewing the video I took some snapshots of the UFO's and the formations to study the objects, and the objects were solid and round.