Give each reference a specific role. An image can establish a character, a product, or a location. A video can demonstrate movement or camera language. Audio can help communicate a sound direction. Identify the part you want to carry into the new shot, especially when a source contains details you do not want to reproduce.
For a product scene, begin with one clear view of the object and a short description of the action. Add another image when a second angle resolves an important detail. For a moving subject, choose a reference with an unobstructed view rather than several images that disagree about clothing or lighting.
Keep instructions explicit about what stays fixed and what can change. For example, preserve the subject and wardrobe while changing the background, or preserve the location while altering the camera path. Add another reference only when it addresses a specific weakness in the result.