I have managed to write a small script (which grew )
It first checks for any new videos added and emails the count to me as "Motion Detected nn".
It then changes the permissions on all the files.
And finally moves them from the Camera folder to my new Emby folder, where Emby now picks them up .
I struggled at first with the move as I had forgot that 'mv' will not merge files/folders but everything (touch wood!!) seems to be working fine now.
Thanks for all the suggestions.