There was a video I saw back in the day. I cannot find it on youtube but what I do remember is that it was basically an edit of the song "mermaid" by tatsuro yamashita. It featured scenes of a mermaid swimming around in what may have been a lake, lagoon, or beach. It (spoliler) ended with the mermaid getting killed or something. The ending was very abrupt, violent, and opposite to the overall vibe of the song.