A possible concise summary is:
A golden mermaid who is curious about humans gets captured by a circus master who wants to use her as an attraction. She escapes with the help of a shopkeeper, but the circus master follows her to the Crystal Island, where he kidnaps her mermaid friends. She uses a magic wand to grow legs and fights back against the circus master, who is defeated by the power of the island. She frees her friends and learns to swim with her new legs.
Here are some key facts extracted from the text:
1. The text is a transcript of a video about a golden mermaid who is captured by a circus master and tries to escape.
2. The golden mermaid trades her scales for items at a shop and learns about the human world.
3. The circus master wants to use the golden mermaid as an attraction and also find the magic crystal island where she came from.
4. The golden mermaid meets a friendly human who helps her escape from the circus, but he is captured by the circus master's goons.
5. The golden mermaid returns to the crystal island and finds it under attack by the circus master and his crew.
6. The golden mermaid uses a magic wand to fight back and free her friends, while also growing legs in the process.
7. The golden mermaid defeats the circus master with the help of the crystal island's magic and returns to peace with her new friend.