Yes, fascinating video. Though I'd seen a few references to insects being up there, I must confess that's terra incognita to me (or caelum incognitum -- not sure of the Latin). A record-setting termite at 19,000 feet? Not much wood up there. What's it doing there? That goes for everything else. Are some of them accidentally lifted up by the winds and can't get down again?
I've heard of spiders "ballooning" on the wind to spread the species to distant places, and some butterflies migrating to other places, but wonder if the other insects are up there for those reasons. And how long are they there? Predators can eat other insects, but non-predators would need to get back down for food. Also it's cold at high altitudes. I thought most insects didn't like cold.
That video raises many questions, and I'm not sure where to go for the answers.