It was only when I saw you using a drill bit at the end of the video that I realised the purpose.
From the thread title, I thought you were going to use a mounted stone point and use it for grinding the inside of some lathe chuck jaws, using it as a toolpost grinder.
I've done that with the motor off a Bosch POF 500a router, fixed in the toolpost on my Myford.
A cheal old router, but with a removable motor unit on a standard 43mm collar.
Bill