Recording Screen in Ubuntu

Ubuntu Screenshots
"printscreen" button. It saves to picture folder by default
https://askubuntu.com/questions/346864/how-do-i-take-a-screenshot


Recording Desktop
(1) If you want to record without downloading anything on ubuntu:
https://tipsonubuntu.com/2018/06/09/record-gnome-desktop-ubuntu-18-04/

(2) Another good screen casting software (open source) and works effectively while playing games - is OBS. https://obsproject.com/download) is made for game streamers and lets you manage multiple video streams simultaneously.