Passenger Records Not One But Three UFOs Outside Aircraft At Altitude

Three UFOs pass passenger jet and one traveler catches them on video. Cruising at altitude these three objects pass at close proximity and they don't resemble any other craft we know.
What is your thoughts on this UFO sighting?

Video Shows Ufo In Slow Motion Passing Airline Summer Barcelona 13/07/2014

A passenger jet was being recorded in the summer skies and while recording the Jet there appeared a mysterious white object shooting past in a straight trajectory making the person that recorded the object believe it to be a UFO.
What is your thoughts on this UFO video?