L I did NOT watch the video so what I am saying may be out of context, but there are a lot of ice crystals floating about in the atmosphere.
I often hear and see it said that contrails do not persist in the atmosphere, they dissipate right away. Supposedly only chemtrails last. I would take contrails lasting longer as a sign of climate change before I believe it was chemtrails. this is not to say chemtrails don't exist though I'm still up in the air on that one. The upper atmosphere is cooling and this would cause ice crystals to persist longer than has been noted in previous decades.