Thanks, Helen!

"If I had to I would caddy snuff thrill comedy,
Or pípín tobacco is long straight to his head."

Machine poetry? Very postmodern.

The video features the tune I ID'd as "Paddy West," but lines 1 and 4 are different. They sound familiar, but I can't place them.

I seem to recall another scene, possibly on a front porch, when somebody else sings the first stanza to a second tune. But perhaps the difference I just mentioned fooled me. I haven't seen the movie in at least 20 years.

The full credits given at IMDb list Shel Silverstein (composer of "The Unicorn" and much else) as reponsible for the film's "Music."

What, if anything, that has to do with the tune(s) of "WCB," I can't say.

The Lloyd-MacColl tune, though very nice, isn't one I associate with WCB. It carries other words as well - I think.

As an example of the "folk process," I heard a local harpist here in Tennessee in 2009 play the Lloyd-MacColl tune exactly. She called it "The Handsome *Galway* Boy."