Hello schabenstolz,
thanks for your tips, I appreciate it.
I will do my best to consider it in the next video.

This video is an additional documentation, but it will not replace the written text. I just want to finish everything so that I can show it all together in the final text post. Drawings, animations, photos and the video.

Yes, with a servo. No, it's not hacked. It is a FEETECH FS90R Micro Continuous Rotation Servo