Be careful not to conflate RVSM contrails with low altitude contrails or chem-trails.
Flying RVSM (Reduced Vertical Separation Minimum) began to gain momentum approx 1997-2005 around the world. In specific cases, many of the older US military aircraft weren't able to attain certification to fly RVSM till 2012 ish. I only know this (or anything for that matter about this topic) because I certified a handful of them.
Why am I pointing this out? First, chem-trails are real, don't misunderstand me. Contrails, specifically those created in the RVSM airspace tend to linger for obscenely long times due to extreme temperature differential, thinner density and less turbulence (hence the reason they fly in that realm), I often see people point to the sky and conflate the two, they are different.
The cartoon, IMO would likely demonstrate RVSM contrails due to the crossing of the earths horizon.
All of that being said, they could still be spraying shit in the RVSM too so, take this as just info.