I prefer the video for this song where Yuki Saito is on the Christmas tree light-covered boat, but the audio quality is much better on this version (re: not obviously taken from a decades-old VHS tape probably recorded off television at EP).

Boat version:
http://youtu.be/QWERUxo-F0s

I recognized it immediately. Man, that's pretty sad. I thought I'd scrubbed most of my anime past from my mind.