Artist Stephen Tompkins has released some live footage of singer/songwriter Daniel Johnston that he recorded in 1999 entitled Daniel Johnston: At Home Live. This imaginatively titled (sarcasm) documentation features Johnston at home (obviously), writing and performing for Tompkins, sort of disclosing his "authentic creative environment" as Tompkins puts it. MP3s and video clips are available for purchase.
The 2005 documentary, The Devil and Daniel Johnston, was a very revealing portrait of the artist, his cult celebrity and his constant struggle with manic depression. No doubt a lot of his impact is tied to his legend, but Johnston is a fascinating figure nonetheless and the documentary was a sad, but excellent, depiction of his life.
His music is still as out there as he is.
Letters From A Tapehead