This is a real find, that I didn’t know about until I poked around on YouTube just a bit longer.
The Collector (the complete movie), appeared as part of One Man’s Dream (1981), a tribute to Walt Disney hosted by Michael Landon. (The short begins at about 1:55 in the overall feature.)
There is a separate fragment of this piece, with Spanish subtitles, but it’s not complete. Leonard Maltin refers to this documentary in his commentary introducing the much shorter version.
I give you the awesomely talented Mike Jittlov, the man who gives new meaning to the words “The Wearing of the Green.”