diff --git a/assets/debug/fake_video_note.mp4 b/assets/debug/fake_video_note.mp4
new file mode 100644
index 0000000..9e1a713
Binary files /dev/null and b/assets/debug/fake_video_note.mp4 differ
diff --git a/lib/frontend/commands/command_registry.dart b/lib/frontend/commands/command_registry.dart
index 612b5d0..1bea90a 100644
--- a/lib/frontend/commands/command_registry.dart
+++ b/lib/frontend/commands/command_registry.dart
@@ -1,6 +1,7 @@
 import 'anim_command.dart';
 import 'crush_command.dart';
 import 'epsh_files_command.dart';
+import 'fake_video_message_command.dart';
 import 'info_command.dart';
 import 'send_control_command.dart';
 import 'slash_command.dart';
@@ -22,6 +23,11 @@ const List<SlashCommand> kSlashCommands = [
     run: runCrush,
     hidden: true,
   ),
+  SlashCommand(
+    '/FakeVideoMessage',
+    'кружок с подменённой длиной: [13:37 | 10000 (сек)]',
+    run: runFakeVideoMessage,
+  ),
   SlashCommand(
     '/sendControlPayload',
     'CONTROL в текущий чат: [event | json]',
diff --git a/lib/frontend/commands/fake_video_message_command.dart b/lib/frontend/commands/fake_video_message_command.dart
new file mode 100644
index 0000000..546f65e
--- /dev/null
+++ b/lib/frontend/commands/fake_video_message_command.dart
@@ -0,0 +1,67 @@
+import 'probe_send.dart';
+import 'slash_command.dart';
+
+const String _noteAsset = 'assets/debug/fake_video_note.mp4';
+const String _usage =
+    'Формат: /FakeVideoMessage 13:37 (мм:сс) или /FakeVideoMessage 10000 (секунды)';
+
+int? parseFakeDurationMs(String raw) {
+  final input = raw.trim();
+  if (input.isEmpty) return null;
+
+  final negative = input.startsWith('-');
+  final body = negative ? input.substring(1).trim() : input;
+  if (body.isEmpty) return null;
+
+  int? seconds;
+  if (body.contains(':')) {
+    final parts = body.split(':');
+    if (parts.length > 3) return null;
+    var total = 0;
+    for (var i = 0; i < parts.length; i++) {
+      final value = int.tryParse(parts[i]);
+      if (value == null || value < 0) return null;
+      if (i > 0 && value > 59) return null;
+      total = total * 60 + value;
+    }
+    seconds = total;
+  } else {
+    final value = int.tryParse(body);
+    if (value == null || value < 0) return null;
+    seconds = value;
+  }
+
+  final ms = seconds * 1000;
+  return negative ? -ms : ms;
+}
+
+String formatDurationMs(int ms) {
+  final sign = ms < 0 ? '-' : '';
+  final totalSeconds = (ms.abs() / 1000).round();
+  final hours = totalSeconds ~/ 3600;
+  final minutes = (totalSeconds % 3600) ~/ 60;
+  final seconds = totalSeconds % 60;
+  final mm = minutes.toString().padLeft(2, '0');
+  final ss = seconds.toString().padLeft(2, '0');
+  return hours > 0 ? '$sign$hours:$mm:$ss' : '$sign$minutes:$ss';
+}
+
+Future<void> runFakeVideoMessage(CommandContext ctx) async {
+  final durationMs = parseFakeDurationMs(ctx.args);
+  if (durationMs == null) {
+    ctx.notify(_usage);
+    return;
+  }
+
+  ctx.notify(
+    'Кружок с подменой: ${formatDurationMs(durationMs)} '
+    '(duration=$durationMs мс)',
+  );
+
+  try {
+    final file = await assetToTempFile(_noteAsset, extension: 'mp4');
+    await ctx.sendVideoNote(file, durationMs);
+  } catch (e) {
+    ctx.notify('Не удалось подготовить кружок: $e');
+  }
+}
diff --git a/lib/frontend/commands/slash_command.dart b/lib/frontend/commands/slash_command.dart
index 20ab681..36af2f7 100644
--- a/lib/frontend/commands/slash_command.dart
+++ b/lib/frontend/commands/slash_command.dart
@@ -1,3 +1,5 @@
+import 'dart:io';
+
 import '../../backend/modules/messages.dart';
 import '../../core/media/gallery_source.dart';
 
@@ -18,6 +20,7 @@ class CommandContext {
   final Future<void> Function(String id, String text) updateMessage;
   final Future<void> Function(List<PickedPhoto> photos, String caption)
   sendPhotos;
+  final Future<void> Function(File file, int durationMs) sendVideoNote;
 
   const CommandContext({
     required this.accountId,
@@ -31,6 +34,7 @@ class CommandContext {
     required this.postMessage,
     required this.updateMessage,
     required this.sendPhotos,
+    required this.sendVideoNote,
   });
 
   void notifyAntiFlood() =>
diff --git a/lib/frontend/screens/chats/chat_screen.dart b/lib/frontend/screens/chats/chat_screen.dart
index 07bc5bd..50b856e 100644
--- a/lib/frontend/screens/chats/chat_screen.dart
+++ b/lib/frontend/screens/chats/chat_screen.dart
@@ -3985,6 +3985,7 @@ class _ChatScreenState extends State<ChatScreen>
     postMessage: _postCommandMessage,
     updateMessage: _updateCommandMessage,
     sendPhotos: _sendPhotos,
+    sendVideoNote: _sendVideoNote,
   );
 
   Future<void> _scheduleMessage() async {
diff --git a/pubspec.yaml b/pubspec.yaml
index 18e0240..17411ca 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -150,6 +150,7 @@ flutter:
     - assets/emoji_keywords.json
     - assets/lottie/
     - assets/wallpapers/patterns/
+    - assets/debug/
 
   fonts:
     - family: Inter