using plex media server as upnp server for kodi

I don’t want to download the plex add on or any of that stuff, I just want to set up plex media server as a upnp server on kodi. Seemed like it would be just as easy as adding any other upnp server, like twonky. But I can’t get it to work.

I’m trying to do it just like this video:

https://www.youtube.com/watch?v=EepisLw-DyM

Only when I get to the menu that has the 3 folders of Music, Photos, Video. I can’t click and open video. Do I need to set up my library settings differently in plex or something?