I think that the main messages are that there are different types of animals such as cows, that are being killed from other animals like lions, so Richard has tried to come up with a way that the cows can be safe from the lions. He used some lights that he made to scare off the lions and this worked he had some people ask him if they can have some lights so he helped them and his community.
He got these messages across the audience by having the images in the background so they had a better idea of what he was talking about. The microphone helped getting his messages across to the audience because his voice was clearer and louder.
The technical support he used was the microphone he had to make his voice louder and clearer, Richard had his slideshow on the big screen to show his pictures.
The presentation skills he used was when he said a joke he laughed so that he was encouraging the audience to laugh with him. he also was moving around his arms and hands (gestures) to express the way he felt about this topic.