Echoes of Flavio's Ghost Dreaming

Wow. YouTube has done it again. I uploaded a little guitar study by Napoléon Coste and YouTube claims somebody has copyright on it. Coste lived between 1805 and 1883, so well beyond the span of any copyright claim and they cannot possibly claim arrangement rights for such a simple piece of music -or can they. Wow again.

The video is here:
https://youtu.be/gXGJcMoS1VY