A horror video typically refers to a visual work, such as a film or a short video, that aims to evoke fear, suspense, or unease in its audience. It often employs elements such as:

1. **Atmosphere:** A dark, eerie setting that contributes to a sense of foreboding and isolation.

2. **Tension:** Building suspense through pacing, music, and cinematography to keep viewers on edge.

3. **Fear-inducing Elements:** Including supernatural entities, psychological disturbances, or real-life horrors like serial killers or natural disasters.

4. **Jump Scares:** Sudden, startling moments designed to elicit a quick, intense reaction from viewers.

5. **Gore and Violence:** Though not always necessary, some horror videos may include graphic scenes to intensify fear and shock.

Ultimately, a good horror video aims to immerse its audience in an unsettling experience, playing on primal fears and the unknown to create a memorable and chilling viewing experience.