Its a bit hard to explain but the videos are pretty self explanatory. Once you start watching you sorta cant stop even if just out of curiosity.
I just cant imagine the amount of time that he must have spent on these voiceovers and at times they are so good that you almost confuse them for the real thing, especially the swooshing noise from the light sabers.
So who is this talented person with a heck of a lot of free time on his hands?
That would be Matt Mulholland