here's a tutorial on getting the original windows 98 screensavers like 3d pipes without trusting a random screensaver site
don't worry you won't have to install it in an emulator or anything, that would be insane
step one
download the windows 98 disc image from here at winworld
step two
use 7-zip file manager (or anything else that can open an iso and old windows .cab files) to open the .iso file.
navigate to the win98 folder in the iso and open WIN98_52.CAB
step three
copy the ss[name].scr files to your c:\windows\system32 directory
step four
stylish pipes

Internet Archive has a beautiful collection of screensavers, and several old school screensaver sharing sites (such as Screensavers Planet)are still around.
Anywhere you can find an .scr file you can follow the above. My fave is Electroportis.
oh my god archive.org has a promotional prerelease screensaver for Freddy Got Fingered
and also various versions of After Dark, of flying toasters fame, but. that's not as insane
