Make sure you practice any presentation before your Web conference call to make sure you sound clear and get your message points across. Speak clearly and loud enough so that the people on the other end of the call can hear you. Speak slowly and take pauses after ideas. Make eye contact with the people in the room with you and also look at the camera during your presentation. Make sure to allow time for questions, both from the audience and your Web video audience, at the end of your presentation.