Amber round lights--four in straight line formation

Amber/gold round lights, traveling from NW to SE.  Solid color, no flashing and totally silent.  One light, then approximately 30 seconds later followed by two closer together, and 30 seconds after that followed by another single one.  Appeared to be much lower than most planes and in a completely different flight path than any planes observed during our 18 years residence at this location.  Vector was approximately half way between horizon and apex of sky, towards the west.  All four lights were moving in a straight-line formation.  Witnessed by three adults on clear night.  Some video recorded on cell phone.