It's an edit of an existing animation. That animation is part of the series of animations made for the Yggdra patch. All the Yggdra animations are inside the Yggdra folder, just as FE7if animations are and FEgirls animations are in their respective folder.
A better debate is whether I should merge all the Japanese folders into the main folders, but I'm saving that for a big eventual revamp of the filestructure that I don't have time for at the moment.
A better use of time would be finishing up this credit list, which is getting close to complete!