diff --git a/projects/IoT/IoTServices/SingalDemo/wwwroot/images/bg.png b/projects/IoT/IoTServices/SingalDemo/wwwroot/images/bg.png
index 5598bb81..f5750696 100644
Binary files a/projects/IoT/IoTServices/SingalDemo/wwwroot/images/bg.png and b/projects/IoT/IoTServices/SingalDemo/wwwroot/images/bg.png differ
diff --git a/projects/IoT/IoTServices/SingalDemo/wwwroot/index.html b/projects/IoT/IoTServices/SingalDemo/wwwroot/index.html
index 93217d23..55b70919 100644
--- a/projects/IoT/IoTServices/SingalDemo/wwwroot/index.html
+++ b/projects/IoT/IoTServices/SingalDemo/wwwroot/index.html
@@ -5,7 +5,7 @@
         body {
             background-color: #000;
             cursor: none;
-            background-image: url(/images/bg.png);
+            /*background-image: url(/images/bg.png);*/
             background-repeat: no-repeat;
             background-position: center center;
             background-size: auto;
@@ -69,7 +69,7 @@
     </style>
 </head>
 <body>
-    <video id="player" autoplay></video>
+    <video id="player" poster="/images/bg.png"></video>
     <div id="vol" class="box">
         <div class="info volume"></div>
         <div class="line">
@@ -153,6 +153,7 @@
                 }
                 else {
                     player.src = src;
+                    player.play();
                 }
             }
             if (command == "pause") {
diff --git a/projects/IoT/IoTServices/SingalDemo/wwwroot/upload/1.mp4 b/projects/IoT/IoTServices/SingalDemo/wwwroot/upload/1.mp4
index 9e0a6d36..8b55c00a 100644
Binary files a/projects/IoT/IoTServices/SingalDemo/wwwroot/upload/1.mp4 and b/projects/IoT/IoTServices/SingalDemo/wwwroot/upload/1.mp4 differ
diff --git a/projects/IoT/IoTServices/SingalDemo/wwwroot/upload/2.mp4 b/projects/IoT/IoTServices/SingalDemo/wwwroot/upload/2.mp4
index 0c77b429..a5e58b38 100644
Binary files a/projects/IoT/IoTServices/SingalDemo/wwwroot/upload/2.mp4 and b/projects/IoT/IoTServices/SingalDemo/wwwroot/upload/2.mp4 differ
diff --git a/projects/IoT/IoTServices/SingalDemo/wwwroot/upload/3.mp4 b/projects/IoT/IoTServices/SingalDemo/wwwroot/upload/3.mp4
new file mode 100644
index 00000000..5e320371
Binary files /dev/null and b/projects/IoT/IoTServices/SingalDemo/wwwroot/upload/3.mp4 differ
diff --git a/projects/IoT/IoTServices/SingalDemo/wwwroot/upload/4.mp4 b/projects/IoT/IoTServices/SingalDemo/wwwroot/upload/4.mp4
new file mode 100644
index 00000000..f11f932a
Binary files /dev/null and b/projects/IoT/IoTServices/SingalDemo/wwwroot/upload/4.mp4 differ
