For a good interview, it is important to put questions in a relaxed way after freezing the footage.
It is also recommended to make interview footage as well. This enables the interviewer to concentrate in the question and answer sessions without being distracted by other necessities such as taking notes.
The contents of the interview include such subjects as “posture variations during the work,” “worker’s
perspective during the work,” “Hand and finger movements for handling tools” and “Mind settings during the work.”