The PDF Association held the Technical Conference 2012 on March 27-28, 2012 in Basel, Switzerland. Almost all sessions have been recorded, and the videos from the sessions are being made available in the «Video» section of this website. Slides used for the presentations can be downloaed from «Downloads» section of the website.
The first video recording made available is from the first session on the first day of the Technical Conference: «7 minutes with a PDF standard – Eight short presentations by seven speakers».
It is a very information and highly entertaining way to learn what you really should know about PDF standards. Standards covered are PDF, PDF/A, PDF/E, PDF/UA, PDF/VT, PDF/X as well as PRC and XMP.