Put it at the start of a monster-themed edit as the opening musical cue, then follow it with Goofy Ahh Sounds for the visual gag and Meme Button Sound Effect to close the joke.
About this sound
This 14-second clip is Mammott singing a steady run of rounded bom and bum notes in a low, warm voice, with no real words, just a simple bass-like tune that repeats. It feels friendly and a bit silly, like a big monster happily humming along to itself. It comes from My Singing Monsters, where it is one of the singing creatures that build each island's song.