diff --git a/src/CasaBot/AutoScan/AutoScanApp.cs b/src/CasaBot/AutoScan/AutoScanApp.cs
index 3364ce7..691dd41 100644
--- a/src/CasaBot/AutoScan/AutoScanApp.cs
+++ b/src/CasaBot/AutoScan/AutoScanApp.cs
@@ -72,7 +72,7 @@ public class AutoScanApp
             .AddJob(downloaderJob)
             .AddJob(scannerJob)
             .AddJob(cleanJob)
-            .OnFinish(OnScanCompleted)
+            .OnFinish(() => OnScanCompleted?.Invoke() ?? Task.CompletedTask)
             .Build();
         
         _scheduler.ListenerManager.AddJobListener(chainer, GroupMatcher<JobKey>.GroupEquals(GROUP_NAME));
@@ -99,7 +99,7 @@ public class AutoScanApp
 
     public string? GetVideoPath(string name)
     {
-        var path = Path.Combine(_options.Scanner.DetectionFolder, name + ".avi");
+        var path = Path.Combine(_options.Scanner.DetectionFolder, name + ".mp4");
         if (!File.Exists(path))
         {
             return null;
diff --git a/src/CasaBot/AutoScan/Implementations/DVRScanner.cs b/src/CasaBot/AutoScan/Implementations/DVRScanner.cs
index 9d1b0c8..ab2852b 100644
--- a/src/CasaBot/AutoScan/Implementations/DVRScanner.cs
+++ b/src/CasaBot/AutoScan/Implementations/DVRScanner.cs
@@ -66,7 +66,7 @@ public class DVRScanner : IDVRScanner
             _logger.LogDebug("DVR Process started with ID: {Id}", process.Id);
             
             await UpdateProcessUntilExits(process, cancellationToken);
-            _logger.LogInformation("Videos scanned successfully!");
+            _logger.LogInformation("Videos scanned successfully after {Duration}", DateTime.Now - _startedAt);;
             
             //Count the number of .avi files and .jpg files in the detection folder
             var aviFiles = Directory.GetFiles(_options.Scanner.DetectionFolder!, "*.avi");
diff --git a/src/CasaBot/AutoScan/Listener/ChainerListener.cs b/src/CasaBot/AutoScan/Listener/ChainerListener.cs
index 0dab405..4a39b90 100644
--- a/src/CasaBot/AutoScan/Listener/ChainerListener.cs
+++ b/src/CasaBot/AutoScan/Listener/ChainerListener.cs
@@ -56,8 +56,12 @@ public class ChainerListener : JobListenerSupport
             if (_chainLinks.ContainsValue(context.JobDetail.Key))
             {
                 _logger.LogInformation("Job '{JobKey}' is the last in the chain", context.JobDetail.Key);
-                if (OnJobChainFinished is not null) 
-                    await OnJobChainFinished.Invoke();
+                if (OnJobChainFinished is  null)
+                {
+                    _logger.LogWarning("There is no OnJobChainFinished event to trigger");
+                    return;
+                } 
+                await OnJobChainFinished.Invoke();
                 return;
             }
         }
diff --git a/src/CasaBot/CasaBotApp/dvr-scan.cfg b/src/CasaBot/CasaBotApp/dvr-scan.cfg
index e6397c6..8a37772 100644
--- a/src/CasaBot/CasaBotApp/dvr-scan.cfg
+++ b/src/CasaBot/CasaBotApp/dvr-scan.cfg
@@ -46,8 +46,8 @@ output-dir = .\media\detected
 
 # Method of generating output videos. Possible values are: SCAN_ONLY, OPENCV,
 # FFMPEG, COPY. Not all features are supported in FFMPEG/COPY mode.
-#output-mode = OPENCV
 output-mode = OPENCV
+#output-mode = COPY
 
 
 # Arguments to add before the input when calling ffmpeg in output-mode FFMPEG