There is a new video out on Homespun Tapes by Zan McLeod, on playing Irish bouzouki. I have not actually watched it, so I don't know anything specific about it, but the instructor, has been doing this for a long time. He also apparently has a DADGAD guitar video in the works (don't know when it will be out).
Here is some basic info
Here is the relevant information: Taught By Zan McLeod. VDZMCBZ01 Level 1 90 Minute Video, Includes Music and Tab With Billy McComisky, Button Accordion
The bouzouki has, in the past thirty years, become a powerful addition to the instrumental line-up of many Irish session and performing bands. Zan McLeod, one of the Celtic music world's most talented bouzouki players, accompanists and arrangers, has created a lesson that is comprehensive enough to be of great value to beginners and experienced players alike. The bouzouki is played with a flatpick and can cover both lead and rhythm roles. Zan starts at the beginning, teaching tunings, basic scales and chords as well as pick technique and rhythmic innovations (cross picking, strumming patterns, accents and syncopations). With the help of button accordion virtuoso Billy McComisky, Zan explores the bouzouki through the study of traditional reels, jigs and slip jigs. You'll learn to play in several keys using ringing drone strings, moving lines, chord substitutions, harmonized scales and counter-melodies, all designed to enhance your accompaniments. The tunes you'll be working on include "Lady Anne Montgomery," "The Galway Rambler," "Kesh Jig," "Barney Bralligan's" and "The Butterfly."
BOUZOUKI TUNING: GDAD
This is essentially the same as traditional mandolin tuning (GDAE) except the high string is dropped a whole step to D. Zan's lesson is taught on an 8-string bouzouki, or "octave mandolin" as he likes to call it (it sounds an octave lower than a regular mandolin).
This tuning has become standard in contemporary Irish/Celtic music, developed in the early 70s by such well-known players as Donal Lunny (Bothy Band), Andy Irvine (Planxty) and Alec Finn (De Dannan).