diff --git a/scripts/monboob b/scripts/monboob
index 50d142bcb0a54007fc90e2fd9fddd345d614a222..da4ef50c3a682fc80a1fa3989ebd8bc910553659 100755
--- a/scripts/monboob
+++ b/scripts/monboob
@@ -106,9 +106,8 @@ class Monboob(ConsoleApplication):
         self.weboob.loop()
 
     def process(self):
-        for backend in self.weboob.iter_backends():
-            for message in backend.iter_new_messages():
-                self.send_email(backend, message)
+        for backend, message in self.weboob.do('iter_new_messages'):
+            self.send_email(backend, message)
 
     def send_email(self, backend, mail):
         domain = self.config.get('domain')
diff --git a/weboob/frontends/videoob/application.py b/weboob/frontends/videoob/application.py
index a08590616bbe15824c855223cf3b14cce4f2c9f5..9da770878eacccd6349b9972386ea22899e4b347 100644
--- a/weboob/frontends/videoob/application.py
+++ b/weboob/frontends/videoob/application.py
@@ -66,22 +66,17 @@ def command_search(self, pattern=None):
         else:
             results['BEFORE'] = u'Last videos'
         results['HEADER'] = ('ID', 'Title', 'Duration')
-        for backend in self.weboob.iter_backends():
+        for backend, video in self.weboob.do('iter_search_results', pattern):
+            row = (video.id, video.title, '%d:%02d:%02d' % (video.duration/3600, (video.duration%3600/60), video.duration%60))
             try:
-                iterator = backend.iter_search_results(pattern)
-            except NotImplementedError:
-                continue
-            else:
-                rows = []
-                for video in iterator:
-                    rows.append((video.id, video.title, '%d:%02d:%02d' % (video.duration/3600, (video.duration%3600/60), video.duration%60)))
-            results[backend.name] = rows
+                results[backend.name].append(row)
+            except KeyError:
+                results[backend.name] = [row]
         return results
 
     @ConsoleApplication.command('Get video file URL from page URL')
     def command_file_url(self, url):
-        for backend in self.weboob.iter_backends():
-            video = backend.get_video(url)
+        for backend, video in self.weboob.do('get_video', url):
             if video:
                 print video.url
                 break
diff --git a/weboob/tools/application/base.py b/weboob/tools/application/base.py
index 843138bc2d4086e7884b590325c265d3edcca78b..ca89d58e00f072bdc26512a483ae966bd9477676 100644
--- a/weboob/tools/application/base.py
+++ b/weboob/tools/application/base.py
@@ -162,3 +162,4 @@ def run(klass, args=sys.argv):
             print 'Program killed by SIGINT'
         except ConfigError, e:
             print 'Configuration error: %s' % e
+            sys.exit(1)