Hi,
to my knowledge the touch module in Mach4, which is very much like the video link you posted, is available in Mach4 only.
All development work on Mach3 ceased a couple of years ago and as a consequence missed out on this feature.
You could of course program it yourself. The probing and numerical parts probably not to bad but the visual components are rather tricky, you are dealing
with Windows graphics environment. If you didn't bother with graphical representations you could do it pretty easy.
I was never very good at Visual Basic, I decided to go straight to Lua and so never developed any skill or fluency with VB so I wouldn't be much help. If you
wanted to do it in Lua I would help, but then the touch module is already in Mach4, no need to re-invent it!
Craig