Adjusting the focal length of your lens (the optical "zoom") will affect the depth of field of your image. This will change the amount of focus of the scene.
This will also subtly alter the look of the image distortion to project it onto a rectangular surface, because the lenses do not project their image perfectly and the exact variations change when the lenses are reconfigured for a focal length. different.
It can also indirectly lead to increased motion blur, as many consumer lenses may reduce their maximum aperture as you get closer to higher focal lengths. If you were filming with the aperture wide open, this reduction in aperture might require the use of a longer shutter speed to expose the scene.