Lufthansa Airbus A380-841 D-AIMG contrails -- symmetrical evolution

Lufthansa Airbus A380-841 D-AIMG, flight LH454 flying over Cambridge at FL360 on January 19, 2017 at about 10:50 UTC. It was a straight level flight that passed right overhead, highlighting the symmetry of the process of entraining the four engine plumes into the two wake vortices’ cores. There are three video segments: the longer first one shows contrails of the approaching plane, followed by shorter segments of the plane passing overhead and then flying away.