The title plays on the English idiom music to my ears, swapping music for moosic to signal the cow sound at the centre of the joke. Short pun based clips like this spread on soundboards and in short form video because the gag is understood in seconds and needs no setup or context. Creators reuse it as a reusable reaction for pleasing moments, farm content and absurd edits, where the unexpected barnyard noise contrasts with whatever satisfying thing has just happened on screen.