How do I organize a speech with a mindmap?

A friend asked a question, "do you write scripts for your videos?" Sometimes I just let the camera roll and get gold. Sometimes I let the camera roll and end up rambling.   When I want to up my game a bit, I create a mindmap.

A mindmap can help me organize my thinking and also help me feel spontaneous. If you watch the video and look at the mind map you'll notice me riffing and straying from the map.