Produced by the BBC in 1994, Part 1 features a Ubik/PKD commercial from Terry Gilliam's kitchen, a late-night UHF/PKD book commercial by Elvis Costello, footage with Tom Disch and Kleo Mini, spiced with a great selection of 1950s photos. Subsequent segments have Gilliam, Disch, Kim Stanley Robinson, Paul Williams, Brian Aldiss, Tim Powers, and James Blaylock discussing the power of Dick's writing.
If you're moved to continue watching after segment 3/6 in Di Filippo's link, you can go here for the last three segments.
I really enjoyed seeing Paul Williams at the height of his eloquent power, expounding on Phil in this. Right now, Paul Williams could use a lift. If you've got a buck or two to spare, I hope you'll consider sending it in Paul W's direction.