Alessandro, do you mean the song in the gino sorbillo video? That's "FuniculÝ, Funiculß." There are a thousand different renditions of that song. Even Pavarotti sang it. The lyrics are about the tram on vesuvius (actually, to be more specific, it is a funicular, hence the name of the song). There's a wikipedia article
about the song, not to mention
Neapolitan music is awesome. I wish I could express how amazing the lyrics are of many neapolitan songs. And the neapolitan dialect is so "rough" and yet beautiful at the same time. Really makes you wish you were Neapolitan. I don't think a more passionate people exists. Whatever they do they are intensely passionate about it; be it pizza, music, film (totˇ, troisi, etc.), or even mozzarella di bufala. If I were to live in Italy, that is where I would live.
Sorry to go off topic a bit. Back to smooth dough balls.