That losira video is keyboard, not mouse. Look at his fingers on the mouse, he doesn't even click much, and 90% of the things he is clicking does nothing to help his game, its just to keep his hands moving.
Why do you think APM has anything to do with winning games? http://wiki.teamliquid.net/starcraft2/GoOdy this guy is known for having incredibly low APM and he still competed at the highest levels for a while, and still pretty good now. https://www.youtube.com/watch?v=oayncywGHYQ
^^ As a theme its generally a thing with those games - I know a guy from the UK who doesn't have any particularly high APM but easily as good as most of the high level Koreans - very scary person to play SC against as the level of mind games and multi-layered tactics he could bring were incredible - and that was just messing about on LAN :S (sadly he burnt out playing competitively).