I'm trying to take footage of my classmates without them noticing the camera with me. I want the camera to be hidden very well as I'm recording and with perfect quality. Can there be a way to do this with any camera and with any backpack so that I cannot get caught doing this? I'm just doing this for a project at one class to show what people usually do in class session. And so it's suppose to be that way. So, any kind of ideas would be great!