This seems to me like a haunted house, filled with ghosts hung up on details about their lives. In fact i believe most of Tool's songs are about a ghost who overdosed.
I don't think that the video, nor the lyrics, have anything to do with ghosts at all.
If you listen to the lyrics and watch the video, you see they fit perfectly with each other...
Listen to the lyrics then, try to understand them... but if you see them as ghosts, then it's your opinion, which I can't change.
I think that everyone sees the video's of Tool on their own way.