To dream that you are watching a movie suggests that you are taking life too easy. Take note how the movie parallels situations in your waking life. Analyze how the characters in the movie relate to your own circumstance and to which aspect of your personal life they represent.
To dream that you are playing a role in a movie portends that a repressed emotion may be revealing itself. Scenes from the movie may also represent images from your past. Alternatively, the dream may be pointing you toward a new role that you might be assuming in the future. Your unconscious may be preparing you for the said role.
To dream that the movie screen is blank suggests that you feel left out of some situations. This makes you depressed and lonely.