You can not set the humidity lower than 68% - it won't let you. I usually have them at 69%, depending on the type of cigars in them. It seems to maintain very consistent humidity and temperature throughout and does indeed circulate air which apparently is filtered (you are supposed to change the air filter every year or so).
Its cool and carefree but it is probably overpriced and does not fit too many cigars, especially with the shelves in place.
I hadnt seen the video - that's pretty cool!
L.