Jamjtx is 100% correct regarding actual training for actual use. If, on the other hand, your curiosity is mearly intellectual, and you would be satisfied without the actual contact practice, i.e. just to "know about" as opposed to "knowing how to use" then there are kata bunkai videos out there that demonstrate and show pressure point use in kata and similar video. But as JAMJTX indicates, you will never learn the actual skills this way.
The older I get, the better I was!