Cutting edges are supposed to be created by the meeting of two surfaces. Most the stuff on honing I see only addresses refreshing one of those surfaces but both surfaces suffer dulling wear in use. Repeatable, dependable creating of a sharp edge requires addressing both surfaces. Flat stones and a matching flat face on the tool to be honed facilitate quick honing.
This video was created in response to Chris Schwarz’s blog post, Shut up and sharpen. He wanted links to videos posted.