[JD]

Assuming your color comes into play in the background, you want to do your white balance using your white card in the speaker’s location before you turn on any color, otherwise the camera will try to compensate for the color, and your flesh tones will be off. Back in the days I used to do video work the cameras were a lot less tolerant of this kind of stuff so I used a vectorscope and waveform monitor to assist in the WB operation. On the WF monitor, look for the flat line that generated by the reflection of the white card and try to get it as thin as possible. If you have manual white balance controls, you will almost always find you can do a better job manual than using the auto feature.