Check that all settings are to automatic. If you do not have automatic focus, you should zoom all the way in on an object, focus, and then zoom out for the shot. Each time the camera is moved, the focus must be adjusted. During the shoot, the director cues everyone else when it is time for them to take an action. Before the cameras roll for each scene, the director reminds every member of the cast and crew what cues they will receive and what actions they are to take.
All cues are two part cues, a ready cue and a go cue.
Exactly when the action is to be taken the director gives a go cue and the person who receives the cue executes the action. Various types of visual signals are acceptable as long as everyone understands before the cameras roll what each signal will mean. With a fade there should be no noise until the fade to black is complete and the camera person stops recording. As you move from scene to scene, various set-ups are needed. If you are using graphics, it is common to set the picture on an easel and to light it with flood lights, although most home video cameras operate in low enough light that auxiliary lighting is not necessary.