Thanks for sharing the video!
Even if you plan to not use the Nervo Board, I would recommend following the correct pin layout to avoid confusion when you will start using the config files of MyRobotLab.

You can run your test directly into MyRobotLab, this would save you time because you wouldn’t need to write a Arduino code each time you want to change the servo movement.
Your WormGear was definitely printed too weak. I print them with much more perimeter layers (shells), up to 5 shells and a 30% infill.

The head of the screws should be countersink into the WormGear to avoid your hitting issue.

It’s nice to see you making progress and not giving up when you encounter an issue!