"Vox Pop" is short for Vox Populi, in the USA we call these kind of short video interviews "Man on the Street".

• Keep a shot list as you go.
  Include the subject's name (double check spelling) and timecode. Make notes on particularly good interviews or sections of interviews.
  
  
• Have subject sign an appearance release form.
  Alternately, ask them on camera if it’s okay to use the video on your website and other places like YouTube.
  
  
• Tell the subject to look at you.
  Or have them look at the camera. Just don't let them bounce back and forth.
  
  
• Ask them to repeat the questions.
  “What's my favorite flavor of ice cream? Why, it's vanilla.”
  
  
• It’s okay to ask the same question twice.
  Ask the subject to rephrase their response, maybe it needs to be shorter.
  
  
• Help your interviewee self-edit.
  If they say something interesting, and then move on to something else, ask them to rephrase the interesting part.
  
  
• Don’t record a conversation.
  It’s really hard to edit chit-chat. Let them finish their thought completely before you speak again... Don’t interrupt / comment along the way “yup”, “un hun”, “really”. If you need to cut them off, do it with the knowledge that you’re starting a new cut.
  
  
• Get the microphone as close as possible to the subject.
  Position the subject so that nothing behind them emits or reflects reflect sound.
  
  
• Light your subject from more than one source.
  No harsh shadows.
  
  
• Frame your shot.
  Place your subject relatively high in the frame. Use a tripod. Do not use hand held camera. Do not zoom or pan.