While inspecting my roof with my drone my neighbor asked if there was another drone above me. my focus was on the drone camera at the time so i looked towards my drone. as i focused towards my drone i noticed directly above/ behind it (visually) overhead at approximately 600 - 800 ft agl an un-uniformed dark shape traveling almost due north rotating counter-clockwise and traveling approximately 30 knots into the prevailing wind direction which was reported by metar as being 180â°at 05 kts. it seemed to be either rolling or changing shape.My wife and daughter were present and she didn't have her phone. my phone was currently linked to my drone app so as the drone was gps enabled i removed it from the controller and began taking pictures. i was screen recording the drone at the time so i was able to video record the entire sighting as well as get photos. there was 1 decent photo taken out of 3. shortly after i was checking on the status of the drone overhead when i noticed a 2nd object of the approximate same size/color/shape at a slightly higher altitude traveling the same heading and also rotating or changing shape in counter-clockwise fashion. my concern turned to landing the drone as it was low on battery. i'm a former commercial pilot working on getting my faa part 107 commercial license, and have held a pilot's license in one form or another since 1985. i would not report anything that i believed could be rationally explained. i can email the screen recorded video.