Like Emong mentioned, the story felt unfinished in a few sections. For example the section around 1:07 felt like it contained some bigger story/idea behind it but it was too short and didn't quite convey what you wanted (or maybe it did and I just didn't get it) and I'm slightly confused about the ending but I guess it's up for different interpretations so I didn't dwell much on it. Editing was generally pretty awesome though I felt some scenes weren't clipped very well so there were about 1-2 frames that didn't feel like they should be there but got left in by accident, for example the scene of Irisviel around 1:31 just felt a tiny tiny bit longer than necessary.
Aside from those the whole AMV was fantastic. I especially love the mood, it's just so beautiful and I don't know how to describe it but it manages to conveys the same feeling as the song despite the lack of literal lyric sync and it just makes it...I don't know, emotionally strong? XD
But anyway I liked it, good job!