When you breathe out in cold weather, you see mist because the warm and moist air from your lungs meets the cold and dry air outside, forming tiny droplets of liquid water as the result of condensation. The mist quickly evaporates as it mixes with the surrounding air
Contrails are made of solid ice crystals.
Contrails form when water vapor from airplane exhaust condenses and freezes, forming ice crystals
They grow when the ice crystals in them attract more water vapor from the surrounding air, which also freezes and adds to the mass of the contrail (called deposition).
Contrails aren't usually visible at low altitudes because the temperature, even though it might be freezing, isn't cold enough and/or the humidity isn't high enough.
Here's a video of three planes taking of at Yakutsk airport at -47°C.... or do you believe they are releasing chemtrails? by mistake? On purpose? Why? Or is it a doctored video?
Videos too short to make an opinion and to see what happens to the contrail or chemtrail later ie does it disappear or linger for hours and spread out into cloud cover. Surely if its a contrail, wouldnt this be far more common without having to go to Siberia, after all Ice forms at Zero Degrees Centrigrade.
How long do the contrails have to linger for them to be classified as chemtrails? From one of the videos that you've provided (here) that doesn't linger long and he still believes it's chemtrail?
Surely?
The air being Zero Degrees Centigrade isn't the only parameter needed for persistent contrails to form.
And ice forms differently at different negative temperatures.
https://www.accuweather.com/en/fi/finland-weather Its below the freezing point of water. Is below 0 DEGREES Celsius scientific enough for you? Seems I guessed right. Water freezes at 0 degrees C and Boils at 100 Degrees C, there are no grey areas here, its an open and shut case.
With metabunk, by the sound of it, is a factchecker site that is probably a fair assumption, You seem to ignore Flat-Earthers when looking at moon landings, I guess we all have our biases eh?
For what its worth I believe contrails exist as do chemtrails.
Here's the quote that I believe you are misremembering:-
What about persistent contrails?
Is it possible for normal contrails to grow and persist?
Is it possible for chemtrails to grow or is all that you see what has come out of the chemtrail tanks? or are the chems mixed with the fuel and it goes through the engines and burns etc?
20+ years of Chemtrail research and I've yet to see any insight into how it's being done?
