diff --git a/app/ui/components/video_player.py b/app/ui/components/video_player.py
index 43ca7eb..14e2a3b 100644
--- a/app/ui/components/video_player.py
+++ b/app/ui/components/video_player.py
@@ -96,6 +96,9 @@ class VideoPlayer:
             sub_folder = params.get('subfolder', [''])[0]
             if filename:
                 title = self._["previewing"] + ": " + (f"{sub_folder}/{filename}" if sub_folder else filename)
+                if Path(filename).suffix.lower() != ".mp4":
+                    await self.app.snack_bar.show_snack_bar(self._["unsupported_play_on_web"])
+                    return
             else:
                 title = self._["view_stream_source_now"]
         await self.create_video_dialog(title, source, is_file_path, room_url)
diff --git a/locales/en.json b/locales/en.json
index eb0e7a4..f69a838 100644
--- a/locales/en.json
+++ b/locales/en.json
@@ -339,7 +339,7 @@
     "empty_recording_folder": "Empty Recording Folder",
     "go_back": "Go Back",
     "previewing": "Previewing",
-    "unsupported_file_type": "Unsupported file type",
+    "unsupported_file_type":"⚠️ Unsupported file type",
     "no_video_file":"⚠️ No video file found",
     "no_recording_folder":"⚠️ No recording folder found",
     "copy_stream_url": "Copy Stream URL",
@@ -351,6 +351,7 @@
     "open_live_room_page": "Open Live Room Page",
     "stream_source": "Stream Source",
     "previewing": "Previewing",
-    "view_stream_source_now": "Accessing live stream source"
+    "view_stream_source_now": "Accessing live stream source",
+    "unsupported_play_on_web": "⚠️ Only MP4 files can be previewed on the web."
   }
 }
\ No newline at end of file
diff --git a/locales/zh_CN.json b/locales/zh_CN.json
index 9c7f8cd..68b55b8 100644
--- a/locales/zh_CN.json
+++ b/locales/zh_CN.json
@@ -341,7 +341,7 @@
     "empty_recording_folder": "录制文件夹为空，暂无录制的直播视频",
     "go_back": "返回上一级",
     "previewing": "正在预览",
-    "unsupported_file_type": "不支持的文件类型",
+    "unsupported_file_type":"⚠️ 不支持的文件类型",
     "no_video_file":"⚠️ 未找到视频文件",
     "no_recording_folder":"⚠️ 录制目录不存在",
     "copy_stream_url": "复制直播源地址",
@@ -353,6 +353,7 @@
     "open_live_room_page": "打开直播间页面",
     "stream_source": "直播源",
     "previewing":"正在预览",
-    "view_stream_source_now": "正在访问直播源"
+    "view_stream_source_now": "正在访问直播源",
+    "unsupported_play_on_web": "⚠️ Web端只支持预览MP4文件"
   }
 }
\ No newline at end of file