The 21-year-old, who plays for Adelaide United in Australia's top league, says he has long felt he had to hide who he is in order to do what he loves.
Cavello has believed that people would treat him differently if he told him he was gay.
- But that has not happened, he says in his video.
Instead, I have been met with greater respect from people.
Cavallo has chosen to tell this to inspire others and show that it is okay to be yourself and at the same time play football.
See the emotional statement in the clip above.