For best results, you should mount your camera fully level on a tripod. This is especially true if you’re a professional user (such as an animator or 3D graphics artist).
For casual use, and fast testing, a tripod is not required. Simply stabilize the camera by holding it steady.
Moving the camera doesn’t affect our ability to detect and reconstruct motion in 3D, but it affects the way we interpret the body’s position in global space.