A deburring wheel is quite unlike a grinding wheel.  It is composed of a fibrous
material, presumably in a slurry of  grit which is then compressed into a wheel.

While I have never measured it's "grinding ability" I have been using these for
years and never experienced any "gouging" as one would expect from a grinding
wheel. From my metalwork experience, I suspect the clean-up passes in that video
don't even remove more than .0001

Eric