Howtoforge published a guide about installing Plex Media Server on CentOS 8
How to Install Plex Media Server on CentOS 8
Plex is a free, open-source and full-featured media server that allows you to stream your photos, video and audio files on your PC, tablet, phone from anywhere around the world. Plex supports most operating systems including, Linux, Windows, Mac, and FreeBSD. Plex also supports several plugins that allow you to watch content from Comedy Central and MTV.
How to Install Plex Media Server on CentOS 8