That youtube account is the same account that kept posting fakes during the s/t runup. And instead of coming and asking whether something is real or fake, how about you try to run it through shazam or something first? It took me two seconds to find that this is "The Wars Of The Last Wolves" from Rurouni Kenshin.
Don't trust anything you hear on the web. I would've thought people had learned after Crucify. I doubt we'll be hearing anything from the new album before december, and when we do get to hear something, it will be from the official channels first. I don't think anyone will even be able to leak this until december - and the people who will have the album early will (as always) have water marked copies which will be traceable by the record label. Right now, the people who do have access to the album are all under quite strict contracts and NDA's. Nobody wants to risk their job or relationships with the band just to be the first to leak some music.