The below description is generated by ChatGPT, I am using it because it accurately describes my script. (crazy right, you can try this yourself)

This code is a user script for the web browser Mozilla Firefox and Chromium Browsers. User scripts are small programs that can be used to customize the behavior of a website. In this particular case, the user script is designed to make YouTube videos louder by modifying the volume control on the website.

The script works by first detecting the speaker symbol on YouTube and the button that controls the volume. It then creates a new element that shows the volume level numerically and inserts this element on the left side of the speaker symbol.

Next, the script creates a new range input element, which is used as a volume slider. This slider is designed to have the same appearance as the YouTube volume slider with a step size of 0.01.

The script then adds an event listener to the volumeSkriptSlider element, which listens for changes to the slider value. When the value of the slider changes, the script updates the volume level of the video accordingly, using the YouTube player Object. This allows the user to adjust the volume of the video to the maximum level possible.

Overall, this user script provides a simple way for users to make YouTube videos louder by modifying the volume control on the website.