The document discusses three documentaries about a murder case from the murderer's perspective, tracking people's health progress, and comparing "supersize" vs "super skinny" individuals and tracking their weight fluctuations. The document notes that one documentary used close-ups to show gestures during an interview with a murderer, while another about medical cases used long shots to capture everything happening. In general, the documentaries employed techniques like fly-on-the-wall filming, handheld cameras, voiceovers, and interviews to maintain realism without heavy editing.