A possible concise summary is:
A mermaid princess gets stranded on an island with four boys who don't like her. She uses her trident and crabs to prank them and get revenge. The boys try to impress her when they find out she is rich, but she leaves them with a cursed island full of crabs.
Some possible facts extracted from the text are:
1. The text is a transcript of a video about a mermaid who gets stranded on an island with four boys.
2. The boys initially reject the mermaid and try to get rid of her, but later change their attitude when they learn she is a princess and has treasure.
3. The mermaid has a trident that can transform her tail into legs and vice versa, and can also summon crabs and other items from the ocean.
4. The island is attacked by pirates and the boys have to fight them off with the help of the mermaid and her crabs.
5. The boys also find cursed blocks that give them fish heads or cause explosions.
6. The mermaid eventually leaves the island with one of the boys, while the others are left behind with flying crabs.