A possible concise summary is:
The text is a transcript of a video where William Bruna tries to prank his friend Alina with horror-themed jokes, such as moving objects with a fishing line, pretending to break his neck, dressing up as a killer clown, and making her disappear with a flash. Alina claims that she is not afraid of any horror stories or films, and that she will prank William back. William asks his viewers to subscribe to his channel and watch another video.
Here are the key facts extracted from the text:
1. The text is a transcript of a video where William Bruna pranks his friend Alina with horror-themed scenarios.
2. Alina claims that she is not afraid of any horror stories or films, but William tries to prove her wrong.
3. William uses various props and costumes to scare Alina, such as a fishing line, a candy, a bear suit, a Jeff costume and a clown costume.
4. Alina reacts differently to each prank, sometimes laughing, sometimes screaming, sometimes running away.
5. William records Alina's reactions and uploads them to his channel, where he asks his subscribers to like his videos.
6. Alina decides to prank William back by pretending to unsubscribe from his channel and making him think that she disappeared.
7. William feels sorry for scaring Alina too much and promises to never prank her again.