White/blue bobbing lights with no form that stops to look at us then shoots away in a flash

My sister and I were sitting out on the deck of our rented condo on the second floor level at the corner of Teller and 3rd Street visiting until about 10:00 p.m., when we had our first sighting of an off-white light bobbing along at ground level just in front of the condo building located directly across 3rd St. to the east from where we were.  We commented that it must be someone with a flashlight walking along that street.
 Suddenly, however, the light started rising at an angle towards the south, then morphed into a flying bright white and blue round object which flew in front of us, turned toward us for a flash and then sped off to the south down 3rd Ave. and around the corner.  There was no body or form of any sort attached to that light.  There was absolutely no noise or sound at all as it flew by and away.
 We immediately came inside and tried to figure out what had just happened.
 The round, off-white light we saw initially bobbing along at ground-level across the street from us, looked like the round, off-white lights that are shown in the video of the event that happened at about 3:30 a.m. the following morning.