Man of Honour
Fixed.
I copied the working folder called K Documentary, called it TV and moved the video files from my K TV into it - it worked!
I deleted the original folder and renamed the new TV to K TV - it worked.
I did this with the other 3 non working folders.
Obviously the Permissions for the Documentary folder must have been different than the other 3 but I went over every parameter several times side by side!
And like I said they worked on my other devices loaded with Kodi 16.
Not really fixed
Anything new I put in them doesn't work but works on all my other devices!