diff --git a/samples/js/demos/html/constraints-and-stats.html b/samples/js/demos/html/constraints-and-stats.html
index 92bc1e5119..ea305a1f6a 100644
--- a/samples/js/demos/html/constraints-and-stats.html
+++ b/samples/js/demos/html/constraints-and-stats.html
@@ -243,7 +243,7 @@ Maximum bitrate
 </tr>
 <tr>
 <td>
-<video id="local-video" autoplay width=400></video>
+<video id="local-video" autoplay width=400 muted="true"></video>
 </td>
 <td>
 <video id="remote-video" autoplay width=400></video>
diff --git a/samples/js/demos/html/face.html b/samples/js/demos/html/face.html
index 7750e8c587..e004ce0a61 100644
--- a/samples/js/demos/html/face.html
+++ b/samples/js/demos/html/face.html
@@ -143,7 +143,7 @@ alert("Failed to get access to local media. Error code was " + error.code + ".")
 setTimeout(initialize, 1);
 </script>
                       
-  <video id="localVideo" autoplay="autoplay"></video>
+  <video id="localVideo" autoplay="autoplay" muted="true"></video>
   <canvas width="1000" height="1000" id="localCanvas"></canvas>      
   <a href="http://www.webrtc.org"><img id="logo" alt="WebRTC" src="../images/webrtc_black_20p.png"></a>
   <a href="http://liuliu.me/eyes/javascript-face-detection-explained"><div id="credit">JS Face Detect by Liu Liu</div></a>
diff --git a/samples/js/demos/html/multiple.html b/samples/js/demos/html/multiple.html
index e5b8a0bec3..35db2ed97f 100644
--- a/samples/js/demos/html/multiple.html
+++ b/samples/js/demos/html/multiple.html
@@ -23,7 +23,7 @@ textarea {
 </style>
 </head>
 <body>
-<video id="vid1" autoplay></video>
+<video id="vid1" autoplay="true" muted="true"></video>
 <video id="vid2" autoplay></video>
 <video id="vid3" autoplay></video>
 <br>
diff --git a/samples/js/demos/html/pc1.html b/samples/js/demos/html/pc1.html
index 61dc6a997b..416a1c680c 100644
--- a/samples/js/demos/html/pc1.html
+++ b/samples/js/demos/html/pc1.html
@@ -23,7 +23,7 @@ textarea {
 </style>
 </head>
 <body>
-<video id="vid1" autoplay></video>
+<video id="vid1" autoplay="true" muted="true"></video>
 <video id="vid2" autoplay></video>
 <br>
 <button id="btn1" onclick="start()">Start</button>
diff --git a/samples/js/demos/html/pranswer.html b/samples/js/demos/html/pranswer.html
index eb807a21ca..ba1949ec1d 100644
--- a/samples/js/demos/html/pranswer.html
+++ b/samples/js/demos/html/pranswer.html
@@ -11,7 +11,7 @@
   </style>
   </head>
   <body>
-    <video id="vid1" autoplay></video>
+    <video id="vid1" autoplay="true" muted="true"></video>
     <video id="vid2" autoplay></video>
     <br>
     <button id="btn1" onclick="start()">Call</button>
diff --git a/samples/js/demos/html/rehydrate.html b/samples/js/demos/html/rehydrate.html
index 61206f9df2..5ea77de597 100644
--- a/samples/js/demos/html/rehydrate.html
+++ b/samples/js/demos/html/rehydrate.html
@@ -11,7 +11,7 @@ video {
 </style>
 </head>
 <body>
-<video id="vid1" autoplay></video>
+<video id="vid1" autoplay="true" muted="true"></video>
 <video id="vid2" autoplay></video>
 <br>
 <button id="btn1" onclick="start()">Start</button>  
