Back in the old days (say 2001) it was very expensive to create instructional video. Nowadays, the ubiquity of cheap digital video cameras, huge graphic cards and sleek but powerful editing packages (go iMovie!) allow for some amazing results.
In other words, you can make powerful gorilla teaching videos in your garage.
Check it out:
See this series out of Kansas State:
http://mediatedcultures.net/mediatedculture.htm
And this series by CommonCraft:
http://dotsub.com/home/user/index.php?target=662
These are examples where editing and crafting a story (instructional design) trump production values. Do you need makeup, lighting, high resolution video, "fidelity" to teach? Nope. What you DO need in spades is quality instructional design - cutting the concept to the sharpest point and pounding it home with deft delivery.
Are we losing the beauty and texture of $500/minute production house video? Maybe. But we have also increased dramatically the return on investment.
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