Visualize the red doors of opportunity in the foreheads of your audience. To gain prestige and publicity, and to market your expert topics to those who pay for speeches and seminars, you must have the right tools of the professional speaker's trade. Prepare your presentation folder with, fee schedule, own demo tapes, etc. We do not suggest video as your first step. Begin creating products.
Speakers are actually in the information business.
As you develop your subject, study it, write articles about it, and come to new conclusions, your body of knowledge becomes more valuable, and salable in many other formats. T-shirts, hats, and even toys based on your expertise. Keep adding new products. Buyers complain about the lack of accessibility to a speaker more than any other issue. No business will survive for long if their best salesperson, and main decision maker is always away from where and how their clients can contact them.