Here is a link to a website called factualTV where you can view various documentaries for free. In the art section there are videos on Tony Cragg, Anish Kapoor, Martin Creed, Michael Landy, Mona Hatoum, Mark Wallinger, Rachel Whiteread, Helen Chadwich, Richard Deacon, Vong Phaophanit, and others.
Free Documentaries on Art
in documentary, video