Here his last GBC module, really no worlds can describe the elegance and complexity of it, specially if you are a Lego gbc buider.
In the video description say that Akiyuky will upload internal mechanism of this module some day. And we will wait.
And this two mechanism "representations" from real things but perfectly functional for LEGO devices, like new GBC modules.
"only" an Harmonic Drive with 1:16 reduction ratio, hypnotic device.
And this Cylindrical cam is a perfect system to actuate mechanisms in a smooth way and with possible synchronization. And with video instructions!