A possible concise summary is:
The speaker, Alexey, tries to eat for three days like three famous Russian women: Aida, Olya Buzova and Valya Carnival. He records his meals, workouts and weight changes. He is surprised by the variety and taste of the food, and he loses some weight by the end of the experiment. He also plays a memory game with flapjacks, plays tennis with a coach, and jokes with his friend Lisa who measures him. He asks the viewers to subscribe to his channel and to Lisa's.
Here are the key facts extracted from the text:
1. The text is a transcript of a video where the speaker tries to eat like three famous Russian women for three days.
2. The three women are Aida, Olya Buzova and Valya Carnival, who are singers, actresses and influencers.
3. The speaker tries different dishes such as khinkali, oysters, sausage in dough, borscht with vodka, yogurt with pomegranate, salmon with vegetables and Caesar salad with shrimp.
4. The speaker also does different workouts such as tennis, push-ups and memory games.
5. The speaker weighs himself before and after the experiment and finds out that he lost 3 kg despite eating high-calorie food.