Weird UFO shot during Paris-Bilbao Flight

On April 5, 2018, a strange unidentified flying object was filming during Paris-Bilbao Flight. What is it?

Eyewitness statement:

I can not give any logical explanation to what I recorded that night, in the second recorded video at about 10 minutes (when the ball of light appeared again) you can see the object more clearly and for a longer period of time.

In my opinion this object could be of an Biological Origin and not Metallic.. This Creature's light or glow could be Bioluminescence. People this is just my opinion but what do you guys think?

Source, 09th April 2018