This is a cover by Fight Your Foes of the "Music Box" theme, from the Five Nights at Freddy's video game series.

You can download the various versions of this cover for free here:
https://fightyourfoes.bandcamp.com/album/five-nights-at-freddys-music-box-theme

CREDITS:

Toreador March, also known as "Votre toast, je peux vous le rendre" ("Your toast, I can return it to you"), was composed by Georges Bizet for Carmen in 1875. It is a "1905 Regina Music Box: Classical Overture" sample from the Music Box Collection album by Hot Ideas Inc.

This cover was arranged, recorded, mixed and mastered by Zach Amory of Fight Your Foes.

Five Nights at Freddy's - "Music Box" Theme

"Music Box" Theme

Five Nights at Freddy's - "Music Box" Theme (Chiptune Loop)

An electronic-punk project by Zach Amory, Fight Your Foes creates original music as well as covers of popular songs from movies, TV shows and video games.