In Blender, I guess you could just, like, do a keyframe for a pan-down by just right-clicking on the camera frame, and going into the object settings by clicking on the cube icon in the interface, then going to the “Transform” section. You’ll find some placement and rotation stuff there. In the rotation subsection, go drag the “X” setting. This will rotate the camera up and down.
Or, if you’re using a video editor, you can just do a simple move-down with animation keyframes.