Try setting it to Enable and then see if the Click to allow comes up.
There was something in that article that said it learned from that and remembered, but I don't know if that is the media such as for YT or just a particular video.
I tried that vid again earlier in Edge and thought at first it wasn't going to play as I just had a black screen with a busy circle which eventually froze and then the video played.
This article has an interesting section where you can uninstall Edge and then reinstall it.
I don't think you need to create another user account - that just looks to be another method of getting a pristine version of Edge.
However, don't forget to create a restore point first and check to see if it has been created before proceeding.
As a belt 'n braces, open the Windows Repair program and use Step 5: Backup to back up the registry - I've found that to be more reliable than restore points.
http://www.thewindowsclub.com/reset-microsoft-edge-browser-to-default-settings-in-windows-10