A possible concise summary is:
João shows his pantry full of sweets and decides to go on a diet with his family. He collects all the chocolates and candies from his mother, Paty and Gabriel's rooms and puts them in a bag. He weighs them and challenges them to lose weight in a month. The winner will get an Apple Watch. He asks the viewers to comment on who they think will win.
Here are the key facts extracted from the text:
1. João has a pantry full of sweets and snacks in his house.
2. João decides to hide all the sweets and snacks and start a diet for himself and his family.
3. João weighs 72kg, his mother weighs 57kg, Gabriel weighs 52kg and Paty weighs 68kg.
4. João promises to give an Apple Watch to whoever loses the most weight in one month.
5. João uploads two videos a day on his channel and asks his viewers to subscribe and comment.