This is the song for the bonus room in Skullmonkeys, a game I played on Playstation my senior year in high school.

Herb and Rex, the Jurassic odd couple, introduce segments featuring the Three Wise Men, singing camels, ice-skating penguins, and the hilarious Paris Bellharmonic Orchestra. There’s even a Motown rendition of “Rudolph the Red-Nosed Reindeer.” The entire cast joins a rousing chorus finale of “Here We Come A-Wassailing,” which is certain to put everyone in the Christmas mood. (1987, 24 minutes.

I always thought the Heat Misers song was kind of a cop out. The lyrics seem a little lazy. Snowie has a rhyme on the verse about what temperature he prefers it to be (“degrees” with “freeze”). Heat Misers version just repeats the word degrees. Wtf is up with that?

here we learn that its wassailing, not waffling, though they don’t explain further.
The practice has its roots in the middle ages as a reciprocal exchange between the feudal lords and their peasants as a form of recipient initiated charitable giving, to be distinguished from begging. This point is made in the song “Here We Come A-Wassailing”, when the wassailers inform the lord of the house that

“we are not daily beggars that beg from door to door but we are friendly neighbors whom you have seen before.”

I tried this when I missed the last bus once.
It didn’t work.
And I got arrested.

Three wise men sing the traditional song with their camels breaking in with some more hip and upbeat verses.

This cracked me up when it first aired and many times afterward on tape. A hunchback conductor deals will a goofy bow tied bell that is steadily ruining the grand performance.
From A Claymation Christmas Celebration is a 1987 CBS Christmas television special