Howtoforge published a guide about installing Plex Media Server on Ubuntu 20.04.

Install Plex Media Server on Ubuntu 20.04

Plex is a powerful and feature-rich media streaming server that can be used to organize your video, music, and photo, and stream them to remote the remote devices from anywhere. It supports many operating systems including, Linux, Windows, FreeBSD, macOS, and many more. You can access the media stored on the Plex server from smart TV, smartphone and streaming box using the Plex media client.

Install Plex Media Server on Ubuntu 20.04