Display Materials Check the application constraints for opening multiple windows and other screen real estate issues. Similarly use images that are not overly large or complicated. Pay attention to display constraints for margins so that everyone sees the same thing regardless of their monitor size. Avoid complicated screen wipes, builds, etc. Avoid dark screen backgrounds.
Speakers tend to feel isolated and slowly slip into monologue drone.
Anticipate questions and the need for clarification. Use past experience presenting the material live to know which are the points in the talk when you commonly need to elaborate. Remote participants will feel disenfranchised and will tune you out. When audio is multi-party Ask for quick introductions of all participants if time permits. Be explicit about using names when interacting with audience members.