I can summarize that thirty minute long video in a few sentences: 1)Indoor air is pumped into the bottom of a vertical pipe serving as a poor man's cooling tow

I can summarize that thirty minute long video in a few sentences: 1)Indoor air is pumped into the bottom of a vertical pipe serving as a poor man's cooling tower, with calcium chloride solution sprayed down against the room air flowing upward and back into the space. The solution is very hygroscopic. 2)The diluted solution is pumped through a solar water heater, and then into the top of a second, similar cooling tower; the hot solution gives up moisture to outside air and increases in concentration. 3)The still-warm solution is then pumped through a radiator to chill it, and then further chilled by another radiator placed at the top of a third vertical water chiller which acts as a swamp cooler, spraying water down into a pipe circulating outside air. I imagine there might be room for further optimization, like leveraging some of the heat from some other steps to pre-warm solution, etc - similar to how steam boilers use 'economizers' and such.