It is claimed that this object was taped in Normandy in western France, if so, then it is a form that appears from time to time and is a genuine unknown. However, it could also be fire on a mountainside and taped elsewhere. There are no mountains in Normandy high enough for this to be a fire on a mountainside in this geographical location.

https://www.youtube.com/watch?v=Pl0nhxwSD74
Story Source:
https://www.youtube.com/watch?v=Pl0nhxwSD74