I do agree . But i have seen planes fly over older trails and i would have to say i dont think there as dense as they appear. This photo is also right on top of the plane it might take time for the air to expand after the wing tip ? I am also going to say that the colors of the trail match what i see in sun light. The video could also be a fraud? With all the studies i have done I have yet to see a proper experiment done where all the variables are counted for. The soil,water and air tests are hard to rule out. So time will tell or a scientist will just do a full and complete experiment including fuel,whats left after the fuel is burnt , weather or not the plane makes them while gaining speed,temps and all this. We need to find a scientist that owns a jet and cares for a full and complete answer. Persistent contrails whether there is poison in them or not still pose a risk to the environment and you cant rule out the geo engineering patents.