Avoid High Contrast in Lighting Situations
Avoid shots of areas that have high contrast such as dark versus light settings, or bright sunlight and shadows.
For example, don't place an interview subject against a bright window or white wall or with sunlight behind the person.
This back light is problematic for the automatic exposure feature of the camera. If the camera focuses on the light in the background, then the face of the subject will be darkened and indistinguisable. If the camera focuses on the person's face, then the background will be washed out in light.
It's usually best to shoot with the sun to your back.
If the sun is directly overhead, hold your hand over the top edge of the camera lens. This will in effect extend the sun screen and avoid having the camera misread the amount of sunlight.