Videos of Lionel Messi playing as a child in Argentina aren't rare. They're all over the place and you have probably seen them (maybe even this one), but it doesn't make them any less fun. It's uncanny how he can play the exact same way and just as brilliantly at 10 years old as he does as an adult against the best players in the world. Many child prodigies flame out and don't become much of a professional, but Messi has managed to have a bit of a professional career so I think he just may have avoided the "bust" label.
That is adorable.