I've been following this series for a few months now. I've watched this countless times, mainly for the song. So please let me say this:
1-AMAZING series! I love almost everything about it, the characters, the voices, the personalities, and the plot. Truly beautiful and fun to watch.
2- Awe striking songs, this one in particular. I've gone to Youtube to look at each song individually, but none can come close to the power and strength of this one.
3- The only thing that I don't like is how 'sometimes' the voices don't match up with the mouths. This only happens for a few seconds every once or twice a video. During the song though, the way their mouths move is perfect for this type of video.
To really show how much I loved this song, I've even made an account on Newgrounds. I've been coming to this site for years and seen some amazing videos. The Bitey series, Tarboy, There She Is; None are this interesting or powerful.
So hats off to you for making a video so powerful that I HAD to make an account just to say, "Wow, Well done." =)