If you are talking about this http://www.youtube.com/watch?v=Y9mKKaEO_VY
then its most probably a bootleg DVD. Except, for the officially released 74 Concert, the rest were posted here on this site.
So my advice is dont buy this "DVD" - you will almost certainly be ripped off.
"Normally i can't dance to save my life.
But as soon as I step in dog shit, I can moonwalk better than Michael Jackson."