Make sure the materials and what you do with the materials are visible. With demonstration speeches, use speech to enhance what it is you are demonstrating. That is, what you do and what you say should work together.
If you cannot reproduce the exact product in your short film, drawings, models, and pictures may be used. Visual representation should be accurate. For instance, if you are teaching some one to throw a shot put, but you do not have a shot put, you can use a softball and paint it a dark color. Don’t use a baseball or soccer ball.
Label drawings, models, or pictures if necessary or be sure to point to a specific thing.
Through out your speech there should never be a prolonged moment of silence.
If your speech has pause in between steps, instead of remaining silent, tell the audience how they you can use the final product, warn them about any errors that are likely to occur if not careful, or any variations of the thing you are demonstrating to them.
Be sure not to confuse the audience by going off topic.
When choosing filler, make sure they are of interest, are informative, and appeal to audiences.