Rolling Stone has the story:
"The Velvet Underground and Captain Beefheart will be the subject of two upcoming documentaries due April 25th as part of the Under Review: An Independent Critical Analysis series.... The Velvet Underground DVD will include interviews with founding band members Lou Reed, John Cale, Sterling Morrison and Maureen Tucker, as well as legendary pop artist Andy Warhol. The Beefheart release will chronicle the influential musician's history with vintage footage, live performances and interviews with most of the Magic Band musicians."
I don't think I have to tell you that it doesn't get any more Overt than Captain Beefheart.