Very difficult to watch all of it, in one sense, since the music is not at all to my taste and I can't say I actually LIKE the movie all that much, but I take Judgement and Reviewing seriously and I always watch the whole thing once I start it, as I would hope someone did my work.
The movie obviously has talent- it has a story, of a sort and some kind of message. The animation follows the song well, I suppose and it is certainly Sorrowful and melancholy, as described. I feel it captures the essence of the song well.
Please put a Flashing Lights warning in the Author Comments, just in case- the sequence is short and probably harmless, but you are also setting an example for others to do so :)
A clearer credit to the song, with a link, would be good-