Here are a few YouTube videos about PCGS grading.
This video is an overview on how your coins are graded at PCGS
PCGS has come a long way in 25 years. People who were there from the beginning weigh in.
PCGS Secure Plus™ Scanner detects re-submitted altered coins.
David Hall's Rare Coin Market Report - 04/18/11 - PCGS
New PCGS Photograde Online lets just about anyone get approximate grades for their coins.
Scott Travers discusses PCGS Secure Plus and his Coin Collector Survival Manual.