Things I Know:
- It was set to "Keep Holding On" Avril Lavigne
- It included multiple different CLAMP couples: Kurogane and Fai, Touya and Yukito and Doumeki and Watanuki
- The bridge of the song also had the text “There are many worlds and many stories but there is only one fate” appear onscreen.
If anyone remembers this video or knows where to find it, please let me know! Thanks