I just press Alt+Ctrl+Shift R ;-) "screencast tool Gnome3 has already a screen recording functionality. Pressing Alt+Ctrl+Shift+R recording will start. There

I just press Alt+Ctrl+Shift R ;-) "screencast tool Gnome3 has already a screen recording functionality. Pressing Alt+Ctrl+Shift+R recording will start. There should be a red icon on the message tray in the right-bottom corner of your screen. If the message tray is hidden, Super+M will activate it. Pressing the red icon will stop the recording. The video is saved in the Video directory on your home directory on webm format."