Wow those light displays are some serious programming. Very nice.
Yeah! Do it Dew! Build one! Fog chillers make such a nice effect!
To work better you need to change one thing from that video. Cut holes on opposite sides at top and bottom.
If you make a tall one in a trash can like that cut holes on opposite sides and blow the fog in from the top and then have a spiral of dryer vent ducting wrap around a few coils on the inside and dump out the bottom. Fill the center and sides with ice and it should create a convective airflow downwards pulling the fog towards the exit.
Ive used the standard silver aluminum dryer ducting. It works well and you can buy a reducer for the top so the small nozzle on the fogger can blow right into it instead of trying to aim it into a 4" opening. I don't recommend taping the fogger to the ducting because that nozzle gets HOT! You don't want a fire. Also a small air gap, 1"-ish, between the fogger and the reducer is good to let the fog vaporize/atomize a little better before it hits the ducting. If it doesn't you run the risk of collapsing the fog and having it form condensation inside the duct. A tight turn right where the fog enters can do the same thing. Run the entry point straight across the top of the can before you make the first turn.
I like to hide mine behind a bush or something and stack the fogger up on a chair with some bricks or wood block to get it to the right height for the "intake." Extend a section like KipKay did out the bottom so you can direct the fog where you want.
The effect looks great in a still garage but outside if there is wind it will just blow away from the exit and not cascade across the ground. It's an awesome effect but tricky in "real-life." You may have to move the chiller and fogger depending on wind patterns that night.
PS KipKay is pretty cool but the dude builds some wack laser rectifier circuits. I blew three cutting diodes!