More art documentaries, collected from thebox.bz:
(Note that you can selectively download particular documentaries from this collection in most bittorrent clients if you ensure it prompts you for a download location.) 

ArtShock

How art made the world (5 episodes)

David Hockney's secret knowledge (2 parts)

Hokusai - an animated sketchbook

Imagine - Gilbert and George

John Berger - ways of seeing (4 parts)

MoMa with Tim Marlow (3 parts)

Northern renaissance (3 parts)

Private live of a masterpiece
  Degas
  Michelangelo
  Botticelli
  Klimt
  Seurat
  Piero della Francesca
  Uccello
  Hokusai
  Munch
  Breughel
  Dali

Sister Wendy (10 episodes)

Tate shorts (15 episodes)

The divine Michelangelo (2 parts)

The eye
  Anish Kapoor
  Anthony Caro
  Anthony Gormley
  Chris Ofili
  David Batchelor
  Dryden Goodwin
  Gary Hume
  Gilbert and George
  Langlands and Bell
  Mark Wallinger
  Michael Landly
  Mona Hatoum

The secret of drawing (4 parts)

Art safari - relational art

Dirty Dali

Francis Bacon's Arena

Goya - crazy like a Genius

Imagine - how to get on in the artworld

Revenge of the nice

The new shock of the new

Toulouse Lautrec - the whole story