This is too good not to share! My friend who teaches in Seogwipo on Jeju Island showed me this music video by a Korean ska band called South Carnival. The song is called "몬딱 도르라"*. Not only is this video cute and vibrant, the song is sung in Jeju-eo! The subtitles are written in Standard Korean, but if you listen closely (and can read/understand Hangul), then you can tell that what they're saying doesn't match up with the lyrics. And this is because Jeju-eo is quite different from Standard Korean.
I don't know enough about ska to consider myself a fan of the genre, but this song is currently stuck in my head for sure. Music is such a wonderful way to preserve language and culture!
*몬딱 도르라" (monddak doreura) is Jeju-eo for "함께 달리자" (hamkke dallija), which means "run together". Unfortunately, 도르다 in Standard Korean can also mean "to vomit," so maybe Koreans who are unfamiliar with Jeju-eo will be confused by the song title.