A possible concise summary is:
Four friends compete in a challenge to lose the most weight in 24 hours by using different methods. One drinks a lot of water, one scares himself with screamers and a snake, one exercises with a trainer, and one does nothing. They weigh themselves before and after the challenge and compare the results. The one who scared himself wins by losing 2.3 kilograms. They ask the viewers to like the video and comment their city for a fan meeting.
Here are the key facts extracted from the text:
1. The text is a transcript of a video where four people compete to lose the most weight in 24 hours by different methods.
2. The methods are: inducing adrenaline by scaring oneself, drinking a lot of water and eating vegetables, exercising with a trainer, and not eating at all.
3. The person who induced adrenaline lost 2.3 kilograms, the person who drank water lost 1 kilogram, the person who exercised lost 0.8 kilograms, and the person who did not eat lost 0.3 kilograms.
4. The person who induced adrenaline won the challenge and received a secret prize.
5. The video also asks the viewers to comment their city name for a chance to have a fan meeting and a video shoot there.