Quote Originally Posted by roto13
I'm not 100% sure what song you're talking about since I can't get that video to work for some stupid reason, but I would assume you're thinking of that one that tends to start off with a long harp intro, right? Well, it was in Final Fantasy X, in the part where Tidus is signing Blitzballs at the beginning. It's called The Prelude. I can link you to the song, if it's not against the rules here.
No, not prelude, prolouge. It plays in FFI and FFIV when you leave the kingdom and cross the bridge.