My advice would be to stay away from this video.
I typed out in great length and detail exactly why but as I was adding my Good Cheese tag my
STUPID MOTHER$%@#ING COMPUTER CRASHED!!!!!
If you want to ask some questions I'm sure the people on the forum, as well as myself, would be happy to help you out. Despite what some people will tell you, sweep picking arps is not some magical secret to being a "world class guitarists." It's just another technique that too many people over use.