Well... talking as someone with a graphic design background (my graduation
)... sometimes it's not about delivering an actual message, but about making u feel on a certain way... Like You were PV from Ayu... it doesn't openly tell a story or something, but it's constructed on the overall feeling of loneliness.
This PV obviously contrast the ideas of the japanese bizarre and kawaii (what isn't unusual for the japanese production at all) and I believe it makes far more sense to someone naturally aware of japanese symbology or aesthetics (and most of us fail on this as most of us weren't raised on that culture
), but I also think this video was planned to cause on people determinated feelings and reactions instead of an actual message...^^
I don't think it's satanic as the video with the reversed music implied, as I believe if we had a major evil trying to conquer earth, it wouldn't be sending us messages to show its purpose
Also, on the eastern culture, the idea of "end of the world" is about ending a moment to start another (like the lyrics of Talkin' 2 myself), they mostly don't believe on a world end on the way we do over here, like, it ends and its over.