@jwz @mwichary Thanks for pointing this out!

For others who happen across this thread, it's also listed as #XAnalogTV on #XScreenSaver's #screenshots page:

https://www.jwz.org/xscreensaver/screenshots

Which, in turn, links to a sample video on #YouTube:

https://www.youtube.com/watch?v=VmM1KkFsry0