Thank you for your guidance. I will look into your suggestions and do some more reading in the forums about epel. I can see that could be better but might run the risk of screwing up something that nethserver installs and maintains. I think that is what both of you are cautioning about.
I have downloaded and installed the static build binary from the link in @dnutan 's post.
I moved the ffmpeg and ffprobe binaries to /usr/local/bin/
For some reason the Memories app gui continues to say it can’t find ffmpeg but when I run occ maintenance:repair from the terminal the output says ffmpeg binary is configured: /usr/local/bin/ so I am assuming that it will work.