Troy Linker, mentioned previously, has links to several useful posts on RDA on the ALA Connect site.

Confused by the different regional codes for DVDs?  Trying to figure out what exactly Blu-Ray is?  Any questions about DVDs you could probably think of, including some you didn’t can be answered at the DVD FAQ from DVD Demystified.  This incredibly in-depth guide is currently being updated to include even more information about Blu-Ray DVDs.

Now that you’ve figured out what you have, now how do you catalog it?  Luckily, OLAC (Online Audiovisual Catalogers) has just published a guide entitled:  Guide to cataloging DVD and Blu-Ray discs using AACR2 and MARC21.