A good interview consists of the interviewee and interviewer sitting level with the interviewer sat at the right or left of the camera, thus the interviewee is looking at them and not directly at the camera. The interviewer must be clear when asking questions and mustn't interrupt the reply. They must ensure they look interested in the answers they are given.
When using a set list of questions, it is good to give the interviewee and idea of what is going to be asked so they can prepare answers. It is worth having many questions, as you may not use them all, but it means there is plenty of footage to use.
Also, it is essential to think about where the interview is, including background and surroundings. This includes lighting and sound.
Here is an example of a good interview:
