I think it is very little video course or demonstration about or on Leavitt's book, especially volume 2 and 3. You have said that don't use dvd(cd) include with the book, it will give you dependence ( I think your meaning is this), so just by playing.
So why no volume 2 and 3? Is chord etude 1 in volume 1 the hardest song? I can play solo in G and solo in Bb (they both are in volome 2 and 3) and now I think etude 1 in volume 1 is hard than these two in fingerings...
Is this reason (dependence)? I think when people can play inversion they will self taught volume 2, so and but volume 1 is more difficult for begenners right? Videos for volume 1 is necessary and for follows are not ?