Selective mutism (SM) disorder is caused neither by an unfamiliarity with the language used in a specific social situation nor by a communication disorder. According to Diagnostic and Statistical Manual of Mental Disorders (DSM-5), SM is considered to be an anxiety disorder and may coexist with social anxiety disorder (SAD) and autism spectrum disorder (ASD). It may co-occur with a variety of emotional responses, including ‘excessive shyness, fear of social embarrassment, social isolation and withdrawal, clinging, compulsive traits, negativism, or mild oppositional behavior’. Because of a substantial overlap between SM and SAD, it is widely believed that the disorders may have similar genetic etiologies. Video self-modeling (VSM) is the use of video to depict the child as a model engaged in appropriate and exemplary behavior as a treatment to improve target behaviors. Although a variety of interventions have been used with SM, behaviorally based techniques are the most successful.