Blues transmit very well. Rehearse your presentation multiple times. This will make you more comfortable when you are on-camera. If your presentation includes written information to your audience, formatting must be scaled for the equipment used. Powerpoint software is a good choice because it does this for you.
Larger font is easier to read through the electronics.
During the Presentation Stand up straight. If you have to, place a ruler in the back of your jeans, slacks or skirt. It will remind you to maintain your posture. Always introduce yourself before speaking. Keep your chin up.