Context: There are 2 big teams from Minas Gerais (brazilian state) and there's a huge rivalry between them. One of the teams (Cruzeiro) finished bottom 4 and went to the tier 2nd league (tier 2/3). This guys cheers for the opposite (Atletico Mineiro) team.
Translation: Hey guys, i cheer for Atletico, but this is a huge loss for Minas Gerais, our state. It depreciates our state, im really sad with these news... Im really sad with these news (lights up the rocket)