It says "Hi, I'm Barack Obama. I will play this guitar in hopes that you will re-elect me as your president for the next 9000 year. I mean 4 years. I'm not gonna be a dictator or anything."
That's a homemade video of a family singing a song called "Galhos Secos".
But the girls brother couldn't control himself and started to laugh at his sister singing totally out of tune.