I haven't watched this yet. A quick glance shows there's nothing new in it. The good thing is yet another news station is taking a serious look at this topic. If it was such a crazy conspiracy theory, that would never happen.
Are contrails left by jet aircrafts really chemtrails to alter the atmosphere?
There's also this article out of England concerning aircraft emissions altering the skies.
What's fascinating is the comments section. Most of them are dumb, but there are a lot of people who believe something fishy is going on.