Thanks to @tempo on the Twitter, I found this YouTube-hosted film of Radiohead shortly after 590,000 folks had viewed it. (I'm always in the second half-million, it seems)
The film was made for New Year's Eve 2007 and features the band in the studio and elsewhere playing every song on the new In Rainbows album with some pretty bizarre interstitials. Par for the course for Radiohead fans, I guess.
If the above embed doesn't work for you, see it on the YouTube - Radiohead - Scotch Mist page.
Oh, and true to my word in my post about downloading In Rainbows for free, I've purchased the physical CD of In Rainbows, and it's on its way from Amazon.