I also managed to create a few first tutorials. This one explains how you can set and configure the various clock faces and screensavers. You can see a small overview of the individual clock faces and animations here. :)

Here is the tutorial: https://nerdiy.de/en/howto-pxlblck-ziffernblaetter-und-bildschirmschoner-konfigurieren/

Some examples are visible in the following videos. Of course most of them look cooler in reality. Sadly, my camera has problems to display the partly huge contrasts and colors in general properly. :/