What the video says is

On the day you exercise, your body must reach a protein of 1.5g per kilogram of meat.

For example, your weight 100 Jin. It's 50 kilograms, so you need to take protein 50 times 1.5, which is equal to 75 grams of protein.

Protein mentioned in the video is not the protein of all food sources. They need extra protein nutrition,

You can check the protein content and fat content of 100g professional food online.

The people who exercise in the video are all professional and have a professional diet exercise plan. According to their daily diet, it is difficult for protein in diet to meet their needs, so extra protein is needed, such as drinking a spoonful of protein powder before exercise and a spoonful of protein powder after exercise, which are strictly regulated.