At first glance, "Cryin' for the Carolines" isn't much. Barely a minute long, it features some guy named Milton Charles singing about the Carolines (whoever they were). What should make our eyes open is that this is the first of the Spooney Melodies cartoons, which were the precursors of the Merrie Melodies (hence, the Looney Tunes).
So, even if there's nothing really to catch the attention of 20-ish people in the 21st century, it's good knowing that this short movie indirectly led to Bugs, Daffy, Porky, Elmer, etc. Leon Schlesinger had a good eye and ear for some things (to the point where he appeared as himself in the Porky/Daffy short "You Ought to Be in Pictures"). Worth seeing as a historical reference.