Some ways of using video and audio to support research:
An interview: It is common practice to make an audio recording of research interviews. This makes it possible to transcribe the interview at a later time and keep an exact record of what was said. A video recording of the interview will help you identify who is speaking (for group interviews) and show you their body language, which will tell you a lot about how strongly your subjects feel about what they are saying, how confident they feel about it, and how honest they are being.
An observation: If your research aim is to collect evidence of particular procedures and practices, or to find out which procedures are most effective, then making a video recording can be a powerful way to do this. This is a common technique used in educational research where films are made of interactions in the classroom. However it could equally be used to observe farming or food handling techniques.
Action research: If your research aims to involve your subject actively in your research, then what better way than to get them to make a video recording of their work. For example if you are trying to find out how something is typically done in your area, you could video practioners as they do it and describe what they are doing it. Or better still you could give them a camera and ask them to film what they are doing themselves.
A public information film: Video is probably the most powerful way of communicating to the people who will be affected by your research. It is not so good for presenting dense, factual material, but is by far the best way to demonstrate or explain something that is happening in the world, particularly if you are using a case study approach.
Follow the link below to see an example: