There are many reasons you might wish to record and interview, capturing video and audio of one or more people talking for an extended period. For example:
This guide provides information about capturing quality audio and video of people you are interviewing, and on creating useful interview questions.
However you should also be aware that that there may be ethical and legal issue involving informed consent to in connection with recording video and audio. Please make sure to ask your instructor about any ethical and legal requirements associated with any assignment hey have created.
For more information about consent with regard to oral history project, you may wish to read this research guide from the University of Texas Rio Grande.
In some cases you might wish to obtain a consent or permission form for a journalistic interview. For more information on interview releases, you may wish to read this guide to Copyright and Fair Use from Stanford University.
The present guide does not provide legal advice of any kind.