Power steering pump or steering rack?

Started getting a noise while I’m moving slowly or stopped and turning the steering wheel. Was hoping one of you fine gentlemen could help me determine if it’s the rack or the power steering pump that is failing. I’ve read up on a few threads and can’t find anything to help determine which of the two it actually is. I can hear a tapping also coming from under where the battery used to be and if I put my hand there I can feel the tapping. I can also feel this through the tie rod end and control arms which has led me to believe it’s the rack. I’d like to only replace one or the other but will do both if I need to obviously. Here’s a video of the noise I’m getting inside the car.

https://vimeo.com/132393590

Should I stop driving the car until this is fixed? What could potentially happen if I keep driving?

As always, your help is greatly appreciated.