diff -r 61775c0158f3 -r d1477fa29943 src/pyams_media/zmi/video.py
--- a/src/pyams_media/zmi/video.py	Wed Sep 09 11:51:38 2015 +0200
+++ b/src/pyams_media/zmi/video.py	Thu Oct 08 12:28:57 2015 +0200
@@ -9,12 +9,6 @@
 # WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
 # FOR A PARTICULAR PURPOSE.
 #
-from pyams_form.interfaces.form import IWidgetsPrefixViewletsManager
-from pyams_skin.help import ContentHelp
-from pyams_skin.interfaces import IContentHelp
-from pyams_template.template import template_config
-from pyams_utils.adapter import adapter_config
-from pyams_zmi.layer import IAdminLayer
 
 __docformat__ = 'restructuredtext'
 
@@ -24,15 +18,21 @@
 
 # import interfaces
 from pyams_file.interfaces import IVideo, IThumbnail
+from pyams_form.interfaces.form import IWidgetsPrefixViewletsManager, IFormHelp
 from pyams_skin.interfaces.viewlet import IContextActions
+from pyams_utils.interfaces import MANAGE_PERMISSION
+from pyams_zmi.layer import IAdminLayer
 from z3c.form.interfaces import HIDDEN_MODE
 
 # import packages
 from pyams_form.form import AJAXAddForm
+from pyams_form.help import FormHelp
 from pyams_form.schema import CloseButton
 from pyams_pagelet.pagelet import pagelet_config
 from pyams_skin.layer import IPyAMSLayer
 from pyams_skin.viewlet.toolbar import ToolbarMenuDivider, ToolbarMenuItem
+from pyams_template.template import template_config
+from pyams_utils.adapter import adapter_config
 from pyams_utils.schema import DottedDecimalField
 from pyams_viewlet.viewlet import viewlet_config, Viewlet
 from pyams_zmi.form import AdminDialogAddForm
@@ -44,7 +44,7 @@
 
 
 @viewlet_config(name='video.thumbnail.divider', context=IVideo, layer=IPyAMSLayer, view=Interface,
-                manager=IContextActions, permission='manage', weight=19)
+                manager=IContextActions, permission=MANAGE_PERMISSION, weight=19)
 class VideoDividerAction(ToolbarMenuDivider):
     """Video divider action"""
 
@@ -54,7 +54,7 @@
 #
 
 @viewlet_config(name='video.thumbnail.action', context=IVideo, layer=IPyAMSLayer, view=Interface,
-                manager=IContextActions, permission='manage', weight=20)
+                manager=IContextActions, permission=MANAGE_PERMISSION, weight=20)
 class VideoThumbnailAction(ToolbarMenuItem):
     """Video thumbnail selection action"""
 
@@ -80,7 +80,7 @@
                               default=Decimal(5))
 
 
-@pagelet_config(name='video-thumbnail.html', context=IVideo, layer=IPyAMSLayer, permission='manage')
+@pagelet_config(name='video-thumbnail.html', context=IVideo, layer=IPyAMSLayer, permission=MANAGE_PERMISSION)
 class VideoThumbnailEditForm(AdminDialogAddForm):
     """Video thumbnail selection form"""
 
@@ -116,7 +116,7 @@
 
 
 @view_config(name='video-thumbnail.json', context=IVideo, request_type=IPyAMSLayer,
-             permission='manage', renderer='json', xhr=True)
+             permission=MANAGE_PERMISSION, renderer='json', xhr=True)
 class VideoThumbnailAJAXEditForm(AJAXAddForm, VideoThumbnailEditForm):
     """Video thumbnail selection form, JSON renderer"""
 
@@ -137,8 +137,8 @@
     """Video thumbnail edit form viewlets prefix"""
 
 
-@adapter_config(context=(IVideo, IAdminLayer, VideoThumbnailEditForm), provides=IContentHelp)
-class VideoThumbnailEditFormHelpAdapter(ContentHelp):
+@adapter_config(context=(IVideo, IAdminLayer, VideoThumbnailEditForm), provides=IFormHelp)
+class VideoThumbnailEditFormHelpAdapter(FormHelp):
     """Video thumbnail selection form help adapter"""
 
     message = _("""You can play the video until you display the image you want.