Thoughts on Cause?
Conventional aircraft were spotted in this video alongside the phenomena.
(https://i.imgur.com/6cumJNh.jpg)
Here a link to one of the videos - there are three attached to this case
https://www.mufoncms.com/files_jeud8334j/95311_submitter_file2__VID20181002181232428.mp4
Quote2018-10-02
Three light blinking ufos glowin hovering over in the distance they moved slowly in the same place. 2 planes appeared in the scene.
That video appears to show two approaching planes, I used to see something like almost every day during summer, until they changed the approaching lane to the Lisbon airport.
Edited to add: where can we see the other two videos? And do you have any link to the case?