So I don't exactly know the names of the songs, I know one is Itachi's first theme, and one is like a konoha village song.

A few of these songs sound so familiar from my childhood playing Super Nintendo games. Does anyone else know what I mean? I feel like Itachi's theme was in and RPG game of some sort.

I've had this feeling with other Anime background music, like Sword Art Online.

Is it just a case of familiar notes and melodies? Are anime songs/BGMs unique to their anime or do they get used for other animes?

Maybe I've just heard them in other anime.

Edit: Asked the same question two lines in a row

Edit 2: Okay, so the song is Senya, and from 30-60 seconds. This part sounds so much like a game I have played.