What genre of music is this OST ?

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[https://www.youtube.com/watch?v=kn7CvTZpyws](https://www.youtube.com/watch?v=kn7CvTZpyws)

I would also like to know what is the instrument that is playing at 5 seconds (a trumpet maybe ?) and if you have some music with this tipe of instrument (not necessary from a videogame).