I assume it basically means that X JAPAN
DID NOT cover 鳥の詩?
I thought the slight timing errors were because the vocalist, at least for the first 30-45 seconds of the vocal part, was struggling to hear his own voice...........
HOLD IT!
I DON'T think it's a fake. Do ANY of X JAPAN's own material feature a piano part at the VERY BEGINNING of the song? Listen to the crowd's reaction to the opener.
Maybe that video was merely a cover of a cover.
EDIT: Got the blog entry with the video it in.
http://speedfreaks.blog.shinobi.jp/Date/20070712/ Anyone mind translating what's been posted?