Some say #Ufo, i say that it is a reflection in a car mirror on a motorway filmed upside down...the lights flashing up n down the object are like when you see cars on a motorway mirror showing round the bend, they go from the middle to the outside as they fly past with their lights on...
pic 1; i turned the image 180 degrees it's some kind of object on the road they went past.
pic 2; I turned the image here 180 degrees and it's something behind them in the mirror that is reflecting cars' lights. no ufo  here
The whole video is filmed upside down looking through te car mirror and looking behind them...in my opinion.