All other advice about interviewing applies, of course. What is particular about the video conference is the physical preparation of the set-up. High-quality video conference set-ups are essentially the same as video-chatting over the internet. The differences are larger and better cameras, internet connections that are typically faster than you can get at home, and dedicated IP addresses for the cameras. If you have good IT support, they should be able to test the connection and communicate with the IT support on the other side prior to your interview to make sure everything works.
This technology is still new, so there are some “bugs” you should be aware of. It is likely possible to connect to the other camera without prior permission from the other side. So if you just type in the address, you may be instantly connected with the other side, and be able test the connection yourself. Of course, this means you are literally spying on the other side’s conference room. But beware –these systems do not yet typically ask for permission to join a session. That means by typing in the address and connecting, you could literally join a conference in progress, and interrupt someone else’s interview. The result will be a three—way teleconference where they will be able to see and hear you.
Know how to turn down the volume of the speakers in your room. Your microphone could pick up the speech from the speakers, sending a echo back to them.
Be sure you know the time you, or they, are supposed to dial in. This is especially important when dealing with many time zones and daylight savings. Check with an time converting-web site to be sure.
There is advice on the web saying that stripes don’t televise well. I’m not sure if this is true, since the American flag looks fine on camera to me. But to be safe, wear solid colors.
Set up the room so that the camera and monitor system work well. If possible, rearrange the position of the camera so that a plain wall is behind you, instead of something like the door, which will clutter the image. See what you look like on camera with a high-backed and low-backed chair. High-backed chairs can look funny on the screen by conflicting with your shoulders. If possible, sit at the end of a table, and zoom the camera in so that a small portion of table-top is visible at the bottom of the screen. That way they can see when you are writing notes. Fill the image but do not cut off the top your head. This creates the largest possible image of yourself. Positioned the camera at eye-level right in front of the monitor. That way, you can look directly into the camera and see them without turning your head or diverting your eyes, which looks funny from their end.