Interesting story.

Last fall I visited System 3 Epoxy and Kern told me of the trouble he was having getting people to follow printed instructions on how to do 2 part caulk adhesive.
I mentioned my sense that my boat plans of the future will have Q-R codes on the plans, using YouTube to show how to do that part of the boat build. His eyes lit up. I got to see the result last Thursday. He has a whole new $20K video studio set up and is getting after it. At my suggestion he will soon have QR codes for “how to” on amost every product.  Glad to see someone listens to me.