Hands on: Find a more interesting screensaver
Screensavers were originally devised to prevent phosphor burnout on CRT monitors, something I’ve only ever witnessed on old ATM displays. With LCD panels there’s no real need for a screensaver, but we’re past the point where such things had a proper function and now they serve mainly to entertain.
From an energy-saving standpoint, screensavers are not a good thing. It’s far better to use Windows Power Management to put your PC on standby, or switch it off altogether, rather than contribute to climate change.