Mid-air 360° videos are videos shot by placing the camera on the drone or helicopter. However, how the camera height of mid-air 360° videos affects user experience is unclear. The study explores whether the camera's height affects users' immersion, presence, and realism. Results suggest that when the camera height is higher, immersion decreases for acrophobic people while first drops and then rises for others because of the broad vision and beautiful scenery. Higher camera height brings a higher presence and worse realism, especially in distance details. Our work contributes to better understanding and designing of mid-air 360° video experiences.