Yes, it is. The 'helltown documentary' is based on real events. It delves into some dark and mysterious happenings in a particular area. People who lived there or were involved in the events were interviewed, and there were also records and evidence presented to support the authenticity of the story.
The fact that it uses real - life accounts. People who were there, witnesses, or those with knowledge of the events were interviewed. Their testimonies add to the authenticity. Also, real locations are shown which match the descriptions of the events.
In most cases, Helltown is not based on real events. It's often a product of imagination or inspired by various fictional elements to build a captivating narrative.