As I said, the lost posting on this site has been located and restored — and in record time. I posted my request for it at 11:17 AM and helpful responses began arriving at 11:27, starting with one from Corey Klemow. You people are amazing.
The restored post can be viewed here for those who missed it. The video link may now be only watchable on YouTube and the bookmark may be off a few seconds but you can figure that out. Thanks, Corey!