Video Edit: Starting at the 4:25 time stamp, instead of typing the following: sudo gedit /usr/share/applications/Godot.desktop
Type this instead: gedit ~/.local/share/applications/Godot.desktop
A simple tutorial to show you how to create a custom desktop launcher for Godot 3.0 on Ubuntu 17.10.
Here are the following resources that I used in the video:
Godot Engine Download
Godot Engine Icon