This video focuses on reading the behaviors of your opponents at the table. It gives general broad scope information with some examples to demonstrate how to use them. It also tackles the effectiveness of tells and when they are to be used. There is no substitude for the books listed below this video. Those books lists specific tells. This video will make the books much easier to digest.

Best Books on Poker Body Language and Tells
Caro's Book of Poker Tells	Caro's Book of Poker Tells (Mike Caro): Excellent book on reading players. A must read if you play live. The book will pay for itself in one session.
Read Em' and Reap	Read 'Em and Reap: A Career FBI Agent's Guide to Decoding Poker Tells (Phil Hellmuth): Excellent compliment to Mike Caro's Book of Tells. Phil studies the subconscious part of the brain and signs to look for.