UFOs Filmed Over Amsterdam, Netherlands And Dallas, USA Between March 17-21, 2012
Super Sonic UFO Filmed Above Birmingham, Alabama By Airline Passenger March 29, 2012
Airline Passenger Filmed UFO Over Canberra, Australia April 4, 2012
It dips upward for a second before it disappears from view. The witness is clearly surprised, speaking a dialect which sounds eastern European. In any language, it's clear he is trying to call someone else's attention, but by then it's too late.
There has been a rash of new UFO sightings lately from airplane windows, but this one also has a segment of the video in which the object is magnified and enhanced. It doesn't help identify the object. It appears to be bowl-shaped and looks like no known aircraft.