The mental illness you are referring to is Schizophrenia, not Schizotypal Personality Disorder (PPD).
Schizophrenia is a severe and chronic mental disorder characterized by a range of symptoms, including hallucinations (seeing or hearing things that aren't there), delusions (strongly held false beliefs), disorganized thinking, emotional dysregulation, and social withdrawal. People with schizophrenia may have difficulty distinguishing between what is real and what is not, leading to a disconnection from reality.
One specific type of delusion often seen in schizophrenia is known as "paranoid delusions." In paranoid delusions, individuals firmly believe that others are out to harm, deceive, or plot against them. They may think that people around them, including family and friends, are not who they claim to be or that they are lying or conspiring against them. This can lead to increased suspicion and a heightened sense of vulnerability and mistrust.
Schizotypal Personality Disorder (PPD), on the other hand, is a separate personality disorder characterized by odd or eccentric behavior, unusual beliefs or perceptions, social isolation, and difficulties in forming close relationships. While individuals with PPD may also experience suspiciousness and paranoid ideation, the intensity and nature of these symptoms are different from those seen in schizophrenia.
It's important to remember that diagnosing any mental health condition requires a thorough evaluation by a qualified mental health professional. If you or someone you know is experiencing symptoms like those described in the short film you watched, it's essential to seek professional help to obtain an accurate diagnosis and appropriate treatment.