During the evening ( 21h15 until 22h30) one red dot in the sky behind buildings disappearing and reappearing in the same area. i think it was a drone, but in this aera during lockdown. activities outside weren't allowed from 19h. it stayed during 1h in a specific area go down and up behind houses and facility. recorded with my phone. took few pictures and videos but the night quality is bad. waited few weeks, and asking around if someone saw something. but nobody. on the video, the red dot diseappared behind the house, and reappeared around 22h30 on the first right house went up to the sky and left. yves