actually i do it on my liquid cooling radiator , it should actually read run all fans at full bore for a few minutes :P Some laptops run their fans backwards some have an extra fan , but basically its turn everything to 100%
its not useless and done regulaly it helps keep heatsinks dust free , not everyone is comfortable taking panels off laptops , i even know people who wont even take the side of their pc
Can't be a gimmick, it's form LenovoDust Removal (C):
Dust Removal: Combining software and hardware, this function enables the fan to remove dust from the CPU heat sink. (The Start button of the dust removal pane is unavailable if the computer model cannot support this function.)
It will run the fan really, really, really fast which will blow the dust off the CPU cooling fins. The fan running this fast will cause some vibration which will also help to loosen the dust from the fins.
I also have a bridge I'm trying to
unloader sell I mean
Edit: I looked at the video in the posted link and the comments and it sounds like it actually does do some good.
The theory is somewhat sound, but I think it's gimmicky.
Runs the fans full bore, might dislodge some dust, but you know how a lot of it is statically clinging to the surfaces.
For a person who isn't likely to do any maintenance on it cleaning wise, might be ok, but they have to use it hehehe.
I agree with others though, a good can of air to blow it out is above this on my list, and on the top is a thorough cleaning where it's opened and wiped down.