Windows is well known for it's screensavers but there are also screensavers for Linux. Here is how to install and run XScreensaver which is a program for Linux. I focus on the Mate and Gnome desktop but XScreensaver also works on KDE, Xfce, Gnome Flashback. It is also included in the LXDE and LXQT desktops.
00:00 Mate Desktop
05:24 Installing XScreensaver
09:50 Create Startup File
15:24 Screensavers
17:08 Gnome Desktop
23:06 Launch XScreensaver
25:32 Lockscreen
27:00 Summary