This is actually a very simple error, I was listening to the song of "One Winged Angel" (From Final Fantasy VII) And looking at the lyrics with the video provided...It didn't match the words. (Here is the link to the video and the lyrics. )

So I noticed that the song was actually for the FFVII: Advent Children Remix.
(This link: ) The words in here match the video.

Like I said a simple error that can be easily switched...