Getting rid of heat...is not the same as cooling, although the end result is similar. Hence the idea behind the video was interesting and entertaining. While an airco is certainly a cooling solution that works fast...it consumes energy like crazy to cool a room, while blasting the heat outside. Energy-wise, an airco is a cop-out. While smart ways of getting rid of heat are usually much less energy consuming, and better for the health of the persons inside the air-cooled room. An airco isn't much cheaper than the whole solution they crafted, the monthly energy bills will make sure of that.
Having worked in a rather small server room that collected the Paraguayan sun when it came up until around 15:00. After that time the shade of a close by building would start covering the room. So there was an airco but the noise of that thing getting rid of the heat was worse than all the computers combined. The neighbors had also an airco close by ours, meaning our airco was sucking in the heat (and noise) ejected by the neighbors airco.
Not only the noise, there were also the head-aches I got from air becoming too dry. It was bad enough that I preferred the sweat. And from experience I can tell that if your computers remain functioning fine as long as the generated heat is disposed off at a quick enough rate. And my own anecdotal research revealed that Intel mainboards and Asus mainboards work better in these conditions than others do.
Besides, on really hot days they made showers available and afterwards a floor-fan to blow-dry...that had a much better effect on me. Airco's in cars work their "magic" even quicker on me than airco's in buildings. Whenever you see me driving, windows are open, no matter what.
Summer days here easily reach 45C-50C (C is for Celsius, I don't know the conversion rate for Fahrenheit, don't care either to be honest). Heck it is winter here in Paraguay and today it was 26C outside!