UFO Or Just A Helicopter?
It does come across as an aircraft, and from apparent flight characteristics/altitude perhaps a heli, Martin.
A man of Trachis' warning:
"When the Barbarians discharge their arrows they obscure the light of the sun by the multitude of the arrows"
Dienekes of Sparta's reply:
"Good news, for if the Medes obscure the light of the sun, the battle against them will be in the shade"
~Dienekes, Battle of Thermopylae 480 BCE [Herodotus 7.226]