Fix panning direction

examples/webgl_video_panorama_equirectangular.html

@@ -105,7 +105,7 @@
 				if ( isUserInteracting === true ) {
 
 					lon = ( onPointerDownPointerX - event.clientX ) * 0.1 + onPointerDownLon;
-					lat = ( event.clientY - onPointerDownPointerY ) * 0.1 + onPointerDownLat;
+					lat = ( onPointerDownPointerY - event.clientY ) * 0.1 + onPointerDownLat;
 
 				}