1999 Volkswagen 2.0L SOHC Engine Noise...?

I don't know how you did this but it was a really good idea. Those video clips (well, the sound anyway) made it obvious that its a top end problem. You definitely have a bad lifter or a loose rocker(which will only need to be tightened. If it is not the rocker then it is a lifter that either either collapsed or has a piece of dirt in it. If it's just dirt you can drain about a half quart to a quart of oil from the motor and add the same amount of Marvel Mystery Oil to bring the level back up. You can also use automatic trans fluid but it won't do quite as good a job. If it is just dirt this will work it out. If you go about 500 miles and it still hasn't stopped ticking then you'll have to get inside the motor. If you end up there go ahead and replace all the lifters while you're there. It doesn't sound really bad so I'm gonna lean toward it being dirt and not a bad lifter.