I don't think I even have #3...
First thing I would do is pull the belts off and see what that does to the noise. Barring that, I would bet that there is something loose inside the timing case.
Did you get the video? I was downloading a .torrent file... that always fouls up my router and makes everything slow. The torrent is done now.
Good idea, guys, about pulling the belts off. I'll give that a try before ripping my engine apart. I, too, believe that something is amiss inside the timing case.