I have a copy of The Weather Wizards Cloud Book in my day bag which is a nice little guide to identify what clouds are up above and which might come next. It's pretty neat.
I've seen this at least 4 times and I've never noticed the chemtrails part. I always just pat myself on the back that I found the right cloud on the chart and move on.
Why would we need chemtrails when we've already made it so that everything that's the color red whispers to schizophrenic people on a frequency only they can hear?