Update app.py

app.py

@@ -672,7 +672,8 @@ async(c, o, p, d, n, m)=>{
             [document.getElementById("output_video").getElementsByTagName("video")[0].src],
             {
                 resolution: 16,
-                size: 512
+                size: 512,
+                autoPlay: false
             }, BABYLON.Engine.LastCreatedScene
         );
         /*
@@ -935,7 +936,7 @@ window.snapshot = snapshot;
         forceUpdate
     ) {
         if (!mesh.isVerticesDataPresent(BABYLON.VertexBuffer.PositionKind) || !mesh.isVerticesDataPresent(BABYLON.VertexBuffer.NormalKind) || !mesh.isVerticesDataPresent(BABYLON.VertexBuffer.UVKind)) {
-            alert("Cannot call applyDisplacementMap: Given mesh is not complete. Position, Normal or UV are missing");
+            alert("Cannot call applyDisplacementMap: Given mesh is not complete. Position, Normal or UV are missing "+!mesh.isVerticesDataPresent(BABYLON.VertexBuffer.NormalKind);
             return mesh;
         }