This page will lead you to some resources to help you prepare your speech, especially if you need to present a self-recorded video speech.
Prepare a script or bullet points to help keep you on track.
Dress well - as if you were giving the speech in person - but wear comfortable clothes.
Choose a good, comfortable spot to film yourself. Avoid echoes, background noise, and distracting elements. Find good lighting -- natural light is best.
Set up your camera. Configure the settings to achieve the best picture quality possible. Landscape mode tends to work better than portrait mode. Position the camera at eye level. Make sure to frame yourself well. Leave some headroom to avoid cutting off the top of your head. Center yourself in the frame or follow the rule of thirds.
Use a microphone if needed to ensure a crisp, clear sound so that your viewers will be able to understand you.
Practice your speech and test the camera and microphone a few times before your final recording.