I believe she is referring to the Toe-Up Two at a Time Socks book by Melissa Morgan-Oakes, which uses the technique of knitting two socks at a time on one long circular needle using Magic Loop.
I don't have this book yet, but am definitely intrigued by it. I'll be giving it a try once I have a little more sock knitting experience.
Anyways, I couldn't find a video when I did a quick search (although I'm sure there must be one out there), but you could try checking out Silver's Sock Tutorial on knitting two socks using this method. There are very clear instructions and pictures. Maybe that will help clarify things for you? Click here
to check it out.