As a rule, Mr. Trudeau is a scam artist. He probably just happened to pick a product that actually works. But even so, don't count on his video actually being accurate or useful unless Dr. Atkins himself directly oversaw the production and approved the end product. Mr. Trudeau is all about hype and high emotion salesmanship.

Get the book. It's invariably going to have much more information in it and will be much more understandable. Also check out the other LC books (something I haven't done myself yet). I understand the Protein Power Life Plan is a particularly informative book about LC in general.