Importing to DVR From Other Sources

I have files from other sources that I would like to have available on the DVR UI in Channels. (Currently, I have to switch back and forth with Plex). I do not need the summaries of graphics, just need to be able to access and play the show.

Is there a way to do this currently?

BTW Channels sits on a WD NAS and I use Firestick and Web UI to access.

Presently, movies only. It's also a very early alpha quality product that developers are not really supporting.