I'm going to point this out as the hidden gem of the thread. I just gave etools.ch a test by feeding it a query I had repeated and refined on every other search engine many times over the past 20 years and never made headway, and it found it immediately.

So, now I have a nice video clip of "The Ballad of the S.S. Forgetful", which it turns out aired near the end of Sesame Street Episode 2130. :)