diff --git a/weboob/capabilities/bank.py b/weboob/capabilities/bank.py
index e25c6014..ecae03a8 100644
--- a/weboob/capabilities/bank.py
+++ b/weboob/capabilities/bank.py
@@ -21,7 +21,7 @@ if sys.version_info[:2] <= (2, 5):
     from weboob.tools.property import property
 
 
-from .cap import ICap
+from .base import IBaseCap
 
 
 __all__ = ['Account', 'AccountNotFound', 'ICapBank', 'Operation']
@@ -85,7 +85,7 @@ class Operation(object):
         self._amount = float(value)
 
 
-class ICapBank(ICap):
+class ICapBank(IBaseCap):
     def iter_accounts(self):
         raise NotImplementedError()
 
diff --git a/weboob/capabilities/cap.py b/weboob/capabilities/base.py
similarity index 62%
rename from weboob/capabilities/cap.py
rename to weboob/capabilities/base.py
index b0ab8a9a..4caebf52 100644
--- a/weboob/capabilities/cap.py
+++ b/weboob/capabilities/base.py
@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 
-# Copyright(C) 2010  Romain Bignon
+# Copyright(C) 2010  Christophe Benz
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -16,5 +16,26 @@
 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 
 
-class ICap(object):
+__all__ = ['IBaseCap', 'NotLoaded', 'LoadingError']
+
+
+class NotLoadedMeta(type):
+    def __unicode__(self):
+        return u'Not loaded'
+
+
+class NotLoaded(object):
+    __metaclass__ = NotLoadedMeta
+
+
+class LoadingErrorMeta(type):
+    def __unicode__(self):
+        return u'Loading error'
+
+
+class LoadingError(object):
+    __metaclass__ = LoadingErrorMeta
+
+
+class IBaseCap(object):
     pass
diff --git a/weboob/capabilities/chat.py b/weboob/capabilities/chat.py
index 75e0cad8..b40e9de9 100644
--- a/weboob/capabilities/chat.py
+++ b/weboob/capabilities/chat.py
@@ -18,7 +18,7 @@
 
 import datetime
 
-from .cap import ICap
+from .base import IBaseCap
 
 
 __all__ = ['ChatException', 'ICapChat']
@@ -36,7 +36,7 @@ class ChatMessage(object):
         self.date = datetime.datetime.utcnow() if date is None else date
 
 
-class ICapChat(ICap):
+class ICapChat(IBaseCap):
     def iter_chat_messages(self, _id=None):
         raise NotImplementedError()
 
diff --git a/weboob/capabilities/contact.py b/weboob/capabilities/contact.py
index 656f4053..8afd8a6d 100644
--- a/weboob/capabilities/contact.py
+++ b/weboob/capabilities/contact.py
@@ -16,7 +16,7 @@
 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 
 
-from .cap import ICap
+from .base import IBaseCap
 from weboob.tools.ordereddict import OrderedDict
 
 
@@ -85,7 +85,7 @@ class Contact(object):
                 'profile': self.profile,
                }.iteritems()
 
-class ICapContact(ICap):
+class ICapContact(IBaseCap):
     def iter_contacts(self, status=Contact.STATUS_ALL, ids=None):
         """
         Iter contacts
diff --git a/weboob/capabilities/dating.py b/weboob/capabilities/dating.py
index 52cbbc1e..cc9d24d5 100644
--- a/weboob/capabilities/dating.py
+++ b/weboob/capabilities/dating.py
@@ -16,7 +16,7 @@
 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 
 
-from .cap import ICap
+from .base import IBaseCap
 
 
 __all__ = ['ICapDating']
@@ -45,7 +45,7 @@ class StatusField(object):
         self.flags = flags
 
 
-class ICapDating(ICap):
+class ICapDating(IBaseCap):
     def get_status(self):
         """
         Get a list of fields
diff --git a/weboob/capabilities/messages.py b/weboob/capabilities/messages.py
index ff48da20..d77c22c0 100644
--- a/weboob/capabilities/messages.py
+++ b/weboob/capabilities/messages.py
@@ -19,7 +19,7 @@
 import datetime
 import time
 
-from .cap import ICap
+from .base import IBaseCap
 
 
 __all__ = ['ICapMessages', 'ICapMessagesReply', 'Message']
@@ -83,7 +83,7 @@ class Message(object):
             self.thread_id, self.id, self.title, self.date, self.sender)
         return result.encode('utf-8')
 
-class ICapMessages(ICap):
+class ICapMessages(IBaseCap):
     def iter_new_messages(self, thread=None):
         """
         Iterates on new messages from last time this function has been called.
@@ -102,7 +102,7 @@ class ICapMessages(ICap):
         """
         raise NotImplementedError()
 
-class ICapMessagesReply(ICap):
+class ICapMessagesReply(IBaseCap):
     def post_reply(self, thread_id, reply_id, title, message):
         """
         Post a reply.
diff --git a/weboob/capabilities/torrent.py b/weboob/capabilities/torrent.py
index 705ca12c..3b87a408 100644
--- a/weboob/capabilities/torrent.py
+++ b/weboob/capabilities/torrent.py
@@ -16,7 +16,7 @@
 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 
 
-from .cap import ICap
+from .base import IBaseCap
 
 
 __all__ = ['ICapTorrent', 'Torrent']
@@ -35,7 +35,7 @@ class Torrent(object):
         self.description = description
 
 
-class ICapTorrent(ICap):
+class ICapTorrent(IBaseCap):
     def iter_torrents(self, pattern):
         raise NotImplementedError()
 
diff --git a/weboob/capabilities/travel.py b/weboob/capabilities/travel.py
index e5797636..0222ee93 100644
--- a/weboob/capabilities/travel.py
+++ b/weboob/capabilities/travel.py
@@ -18,13 +18,13 @@
 
 from datetime import time
 
-from .cap import ICap
+from .base import IBaseCap
 
 
 __all__ = ['Departure', 'ICapTravel', 'Station']
 
 
-class ICapTravel(ICap):
+class ICapTravel(IBaseCap):
     def iter_station_search(self, pattern):
         """
         Iterates on search results of stations.
diff --git a/weboob/capabilities/video.py b/weboob/capabilities/video.py
index 3f09be7c..552a6c33 100644
--- a/weboob/capabilities/video.py
+++ b/weboob/capabilities/video.py
@@ -16,7 +16,7 @@
 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 
 
-from .cap import ICap
+from .base import IBaseCap, LoadingError, NotLoaded
 
 
 __all__ = ['BaseVideo', 'ICapVideo']
@@ -36,17 +36,18 @@ class VideoThumbnail(object):
     def __iscomplete__(self):
         return self.data
 
+
 class BaseVideo(object):
-    def __init__(self, _id, title=None, url=None, author=None, duration=None, date=None,
-                 rating=0.0, rating_max=0.0, thumbnail=None, thumbnail_url=None, nsfw=False):
+    def __init__(self, _id, title=NotLoaded, url=NotLoaded, author=NotLoaded, duration=NotLoaded, date=NotLoaded,
+                 rating=NotLoaded, rating_max=NotLoaded, thumbnail=NotLoaded, thumbnail_url=NotLoaded, nsfw=False):
         self.id = unicode(_id)
         self.title = title
         self.url = url
         self.author = author
         self.duration = duration
         self.date = date
-        self.rating = float(rating)
-        self.rating_max = float(rating_max)
+        self.rating = rating
+        self.rating_max = rating_max
         self.thumbnail = thumbnail
         if thumbnail_url and not self.thumbnail:
             self.thumbnail = VideoThumbnail(thumbnail_url)
@@ -62,7 +63,7 @@ class BaseVideo(object):
         return self.id2url(self.id)
 
 
-class ICapVideo(ICap):
+class ICapVideo(IBaseCap):
     def iter_page_urls(self, mozaic_url):
         raise NotImplementedError()
 
diff --git a/weboob/capabilities/weather.py b/weboob/capabilities/weather.py
index 068d7adf..01c7e28d 100644
--- a/weboob/capabilities/weather.py
+++ b/weboob/capabilities/weather.py
@@ -16,7 +16,7 @@
 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 
 
-from .cap import ICap
+from .base import IBaseCap
 
 
 __all__ = ['City', 'CityNotFound', 'Current', 'Forecast', 'ICapWeather']
@@ -49,7 +49,7 @@ class CityNotFound(Exception):
     pass
 
 
-class ICapWeather(ICap):
+class ICapWeather(IBaseCap):
     def iter_city_search(self, pattern):
         raise NotImplementedError()
 
diff --git a/weboob/core/backends.py b/weboob/core/backends.py
index 64dccc0d..f9cd5db3 100644
--- a/weboob/core/backends.py
+++ b/weboob/core/backends.py
@@ -25,7 +25,7 @@ import os
 import re
 import stat
 
-from weboob.capabilities.cap import ICap
+from weboob.capabilities.base import IBaseCap
 from weboob.tools.backend import BaseBackend
 
 
@@ -80,7 +80,7 @@ class Backend(object):
 
     def iter_caps(self):
         for cap in self.klass.__bases__:
-            if issubclass(cap, ICap) and cap != ICap:
+            if issubclass(cap, IBaseCap) and cap != IBaseCap:
                 yield cap
 
     def has_caps(self, *caps):