there oughta be | LED Cube CPU status display #led #rgb #raspberrypi @ThereOughtaBe | Uploaded November 2023 | Updated October 2024, 2 hours ago.
Ok, it is an older project from 2020.
Here is the original video: youtu.be/QqknzoxHMFo
And the link shown in the video actually leads to the blog post:
there.oughta.be/an/led-cube