I just watched this on youtube.  It's a DVD called The Byrds: Under Review.  I thought it was very good; and I think would make a great purchase as a DVD.  It's an excellent history of the Byrds, with insightful interviews, touching on important highlights, and some nice music along the way.  It's long; so you'll want to set aside some time.  But I think it well worth the time spent.

Thanks for the heads-up Dave. I'll put it on my 'must buy' list.
 
Graeme

Love the Byrds.  I'll check it out.  Thx Dave!