Well, thank you Sorcha. The clip is a pretty short one, but it answers both questions: Doc does insert a little roll up to the 4-chord between lines, but he plays the break "straight".

The lyrics you mentioned are from an Italian source and are thus a little wacky, though better than my transcription of an Italian song would be. In any case, I found a couple of other sources for the words Doc uses, which, once again, differ slightly from the Delmores.

Mais merci bien alors.