Its not obvious but it can be done
Want to learn How To Add Plex Channels To The NVIDIA Shield Media Server? The new Plex Media Server on the NVIDIA Shield is wound right into the Plex app. This provides a lot of advantages for NVIDIA Shield users including local media storage and the ability to launch all of their media directly from the set top device without the need to run a separate computer.
One tricky issue though is adding channels. The interface has no channel listing section like some other apps and the plex website. Follow this guide to learn How To Add Plex Channels To The NVIDIA Shield Media Server. Also for more see our video at the bottom of the page.
First go to the Plex website Here
Sign in to your plex account in the upper right hand corner
Launch the Plex web app
Select the Plex server for the NVIDIA Shield
Click Install Channels
Choose a category
Choose a channel to install
Check your NVIDIA Shield Plex App to see your new channel
How To video