530i Ticking/Whining Noise w/ VIDEO-Please help diagnose..

I have a 2006 BMW 530i w/ 125,000 miles The ticking noise starting about 6 months ago and has not gotten any worse. It appears to be coming from the alternator area. I am not sure if it's the alternator, belt tensioner, pulley, vacuum pump or something else. The ticking noise does not appear to be coming from the valves. Click on the You Tube Link to view video. Thanks, Steven

Vaccum pump is right under the alternator; that may be making that noise.
I'd recommend you to drop the drive belt and spin each pulley by hand and rule out all the pullies. That way, you can narrow down if the noise is external to the engine or internal to the engine.

While the belt is off, start the car and run it for few seconds and see if that noise goes away. If the noise goes away, then you know the noise is external to the engine. If the noise continue [even with belt is off] then you need to scope further. Don't worry, nothing bad will happen if you run the engine for few seconds while the belt is off. You will get errors on the dashboard stating the alternator/electrical problems. Ignore them since you know the alternator is not running.