I'd like to know beforehand when people call me if video is expected or not. A friend of mine ended up answering with video, but the interviewer only used voice

I'd like to know beforehand when people call me if video is expected or not. A friend of mine ended up answering with video, but the interviewer only used voice. Then felt it was too late to turn the webcam of, and ended up in a weird one-way session making the experience even more stressful.