This is the Oscar-nominated Best Song from the movie Scrooge, the musical adaption of Dickens' A Christmas Carol, with a score by Leslie Bricusse. The number features Albert Finney and, in the lead, the wonderful Anton Rodgers. (He first came to my attention when my folks came back from a trip to London and had seen the musical, Pickwick, based on Dickens' novel, with Harry Secombe, and raved about the show, about Secombe, and in a supporting role as Alfred Jingle, about Anton Rodgers. I think you can tell by his performance here in Scrooge what so impressed them. By the way, Pickwick had music by Cyril Ornadel and lyrics by...Leslie Bricusse! So, we're just piling on all the various connections we can. By the way, I wouldn't be surprised if the Pickwick and Bricusse connection, which came six before the movie, had something to do with Leslie Bricusse -- who also wrote the screenplay and was the executive producer of the film -- wanting Rodgers for the role.)
Note: if you haven't seen the movie, this comes from The Ghost of Christmas Yet to Come sequence. The people can't see Scrooge, though he thinks they're cheering him -- when what they're overjoyed about is that he has died and all their debts to him are wiped out.