Kazam is a simple screen recording program that will capture the content of your screen and record a video file that can be played by any video player that supports VP8/WebM video format.
or you can manually add ppa and install
sudo apt-get update
sudo apt-get install kazam
kazam use gstreamer as backend so you can record in webem or mp4 format with pulseaudio sound format
Project Link : https://launchpad.net/kazam
kazam is also work with Linux mint and other Ubuntu based distributions