Beowulf asked quite a while ago for information on instructional videos.
If I may have a short plug: I run Technical Video Rental.com.
As you might guess from the name, we rent out craft and technical videos (sort of like Netflix).
We've been around for two years now, and because of customer suggestions, we're expanding from metalworking/welding/ sheetmetal videos into craft videos. At this point we carry a small set of pottery videos (only 11, right now)...but if there's interest, we'll expand our inventory.
Please check out the site:
TJIC