How do I run this script?

[shamefulCake1]

Apologies for something so immensely stupid, but it's my first time with javascript.

I have followed the howto, replaced the auth token, set the settings.

Now how do I actually run this code? Do I paste it into the browser console? Or run with node.js? Or with tampermonkey?

Is there some button to load a local file in chromium?

[shamefulCake1]

Sorry, stupid me, just copy-paste it into the javascript console.

(It is in the video, but my browser does not support videos.)