Nobody knows this exists. Studio Ghibli made a single music video for a song most Western fans have never heard, buried it on a DVD compilation, and moved on. What you find there is three minutes of pure hand-drawn animation with no narrative weight, no character arc, no reason to exist except that someone wanted to spend resources making something beautiful for a musician most people forgot. It hits because it's completely unnecessary, which is exactly why it matters.
Studio Ghibli animated this short music video for a song by Meiko Haigou. In it, a girl wanders at an easy pace through a town of bugs, singing as she strums her acoustic guitar. The piece is gentle and built around the music rather than a story, a single short clip that makes up the whole release. The clip appears on the Ghibli ga Ippai Special Short Short DVD.