Video of Normal Contrail and Skylong Chemtrail in Sky TOGETHER Crossing at Cruising Altitude

I've taken a couple pictures myself of contrails and chemtrails in the sky at cruising altitude in the same sky, sharing the frame
BUT THIS IS VIDEO of such, taken by a dad in Alice Springs AU outside his daughter's school.
The planes (one contrailing normally, the other chemtrailing abnormally) approach each other and then pass each other in the same region of the sky. The shorted one doesn't pass through a somehow damper/colder part of the sky and get longer. The chemtrails one doesn't diminish to a normal contrail once it's out of humid-air.