InnerRise (the creator of the video) has left hate comments on most popular YouTube videos about Ayu. He really really really hates Ayumi. Take a look at his page:
http://www.youtube.com/user/InnerRise
I knew InnerRise before he decided to be a creeper. He can't handle a rebuttal. He would fight with people and then threaten to call the police in attempt to keep them from replying. He always wanted to get the last word but usually could not manage to do it. It is why he blocked everyone and altered his home page to what you see now. It's an embarrassment and a shame to see someone I had good conversations with (about Utada) turn into a crazy creep. He would always PM everyone (I assume everyone he knew on YouTube because he addressed the messages for multiple recipients) about an Ayumi fan he was fighting with at the time and expected us to help him harass them.