This clip appears as a user-uploaded, fan-made audio on a soundboard site, listed under the German title Marcel Torhymne with ID3 tags naming the vocal Braaaa. No official release or broader media source is documented for it, so it reads as a personal in-joke rather than a commercial anthem. Sounds like this survive because football groups love having a dedicated audio tag for one player. Played from a phone or stream deck, it turns any Marcel goal into a repeatable ritual that friends recognize instantly.