A possible concise summary is:
The video is about a 90-day body transformation challenge of Stan, a 20-year-old who never worked out in his life. He is coached by Brownie, a fitness YouTuber and his childhood friend. Stan has to gain weight, muscle and strength, and he wins 500 bucks if he achieves the goals set by Brownie. The video shows his progress, workouts, diet and struggles along the way, as well as the final results and a professional photo shoot. Stan manages to complete the challenge and gain six kilograms of lean mass, improve his pull-ups, push-ups and calorie-burning performance, and look more muscular and fit.
Here are some key facts extracted from the text:
1. Stan is a 20-year-old who never worked out in his life and accepted a challenge to transform his body in 90 days.
2. He had to gain weight, muscle and strength and follow a specific workout routine and diet plan created by Brownie, a fitness YouTuber.
3. He started at 69 kg, 3 pull-ups, 23 push-ups and 34 seconds to burn 20 calories on a machine called the beast.
4. He ended at 75.5 kg, 8 pull-ups, 35 push-ups and 20 seconds to burn 20 calories on the beast.
5. He also had a professional photo shoot to showcase his results and won 500 bucks from Brownie.