If a scene contains more than one camera, the topmost camera in the Layers list and in
the Timeline at the current frame is the active camera. Although the active camera is the
default camera used for export, you can select any scene camera to export.
Camera 3 is active at playhead position.
Note: The active camera is not the same as the active view. The active view is the last
viewport you clicked in when working with multiple viewports.