Master Fingers

So I'm upper level gold and I've been trying to watch more replays and streams lately to improve my game. I see a lot of grand masters and pros hands moving at a mile a minute right off the bat and honestly, other than just doing the same thing over and over again for a higher apm, I cannot fathom what in the fuck they are doing. So, can someone break it down for me.

The best example I can show is one placed on here recently by Gemini

http://www.twitch.tv/geminisctv/c/2147939