You can find a more detailed explanation at https://nigigi.com/en/paid-sale-tissue-holder-for-one-handed-tear-toilet-paper-holder/

It is recommended to print with a 0.4mm nozzle.

The design consists of six parts and is modular, making it printable even with 180×180mm 3D printers like the Bambu A1 Mini.

Using PETG is highly recommended.This is because the design uses PETG’s elasticity for assembly, and it remains stable over time without deformation.

There are some slight improvements and modifications since the YouTube video, but as long as you carefully check the assembly points, it should be easy to put together.