When you can't meet someone face-to-face because of time pressures or just because it makes economic sense, a video conference is the next best thing. This lets you see the other person and let's them see you. There's a lot to be gained in person-to-person interactions where you can pick up a lot of subtle non-verbal clues as to how the other person is receiving or reacting to your message.
Being shown on video, however, is not just like being there in the room, so you have to be a bit more aware of how you present yourself and what you wear than you might be if you were sitting down with someone in person. You don't want anything, not your hair, not your clothes, not the room, not the technical aspects of the system, or any other number of things to distract the people on the other side of the transmission line from your message.
One of the easiest things to control is what you wear. Believe it or not, this does make a difference. Some colors and patterns just do not work well in the video environment. For example, for men striped or patterned shirts sometimes do not display well on remote sites, white shirts also can be a problem because of glare. Light blue or pastel shirts work best. For the same reason women should not wear white or bold highly patterned dresses, tops, or jackets. Red and black can also be problematic in transmission. Solid colors or pastels are the best.
For women, watch your jewelry, especially if it is shiny or dangles. You don't want anything to brush against the microphone or tabletop or cause feedback during the call. And you don't want to wear anything that would be distracting due to its own motion. For men, silver tie clips can also reflect light and become a visual annoyance. Tinted glasses are also a no-no because they mask your eyes and cover part of your face, the open appearance of which is an important part of the visual experience.