I am somewhere around half of this (yeah right !)
... Trying to get there !
The time required to get to this is proportional to how much time and money you are willing to invest. An average would be about 2 years of dedication. A friend I am flying with went to 75% of what is done in that video in about 7 months. Again, it all depends on time and money.
The trick is to master everything on a good sim first. For helis, Phoenix seems to be best. Real-Flight and Reflex are also very good. People who want to go to this level have to spend at least an hour or so on the sim many days a week (for the initial part).
I have not been careful about shooting videos (either of me flying or others flying with me). Here are some uploaded, and they all suffer from [1] bad flying and/or [2] bad camera and/or [3] bad camera operation
http://www.youtube.com/user/anwarpp