It's quite useful if you want to make close up video clips to look better.
Overall this design works pretty well and I have already made a lot of nice shots with it.
Parts list:
-Arduino
-28byj-48 stepper motor with driver
-3x 608 bearing (8x22x7mm)
-2 screws to mount the motor
-on/off switch (optional)
Contact me if you need arduino setup instruction or code!