Replace that water pump!!!!!!!!
There's way too much wobble and movement on that water pump pulley. Either that's a terribly made pulley, or you're losing the bearings on that water pump shaft.
As far as the noise, I don't like it. It's hard to diagnose sounds from video's though, the mic's can magnify some sounds and minimize others. But the sounds coming from that engine in the video would concern me if that's how they sound in person. It might not be anything, but I would want to find the source so I had an explanation.