diff --git a/web/src/components/MsePlayer.js b/web/src/components/MsePlayer.js
index a95e8de340..ac0062391a 100644
--- a/web/src/components/MsePlayer.js
+++ b/web/src/components/MsePlayer.js
@@ -217,6 +217,7 @@ class VideoRTC extends HTMLElement {
     this.video.controls = true;
     this.video.playsInline = true;
     this.video.preload = 'auto';
+    this.video.muted = true;
 
     this.video.style.display = 'block'; // fix bottom margin 4px
     this.video.style.width = '100%';