Graveyard Jamboree (4:11)
IMDb; Screen Novelties; Wikipedia; YouTube

So, this uses stop-motion animation, puppetry, and silhouette animation. It was made in 1998, but I first saw it sometime in the early 2000s, on Exposure. It uses a 1930 song performed by Harry Reser, about a character called Mysterious Mose, who first appeared in a 1930 Betty Boop cartoon. In this version (which is quite different from the Boop cartoon), Mose is a puppet who wanders around scaring people and in the end, conducts an impromptu concert in a graveyard. The film is at once spooky, amusing, kitschy, and retro-cool.