This first video is a step by step tutorial commentated by ForceSC
Remember most top level players already know this build. So, if you really want to win games at the higher levels throwing in curve balls for deception is the key. This build is very versatile and that is the reason many upper level people use it.
Here is a video of a tutorial and execution of the 1/1/1 build commentated and played by HDsc
I have started linking the youtube pages of the people I've been linking.
And remember getting better at Starcraft requires practice, watching videos, and playing with good people.