Would this 2002 French animated series also known as Esprit Fantômes in French be considered lost media?
It's about a family consists of an elderly couple and their grandson who live in a mansion and her grandson is a cop who's job is to investigate and they solve the supernatural events that happens in their village and mansion, and they befriend three ghosts who help them.
I always debated whether I should make a Lost Media article on this show.
The whole show is officially available to watch on Amazon Prime Video in English but it it's only exclusive to UK customers.
Some episodes are available in Spanish but the rest of the series on YouTube can be watched in French.
And MIXXPOST has started uploading the first couple of episodes in English on YouTube.