$ sudo apt-get update
$ sudo apt-get install fenix-plugin-mpeg 

fenix-plugin-mpeg is installed in your system.

Make ensure the fenix-plugin-mpeg package were installed using the commands given below,

$ sudo dpkg-query -l | grep fenix-plugin-mpeg *

You will get with fenix-plugin-mpeg package name, version, architecture and description in a table

fenix-plugin-mpeg package basic information: