Exactly what is a group for OGUR?

I have a big question, I have a group content type 'community'. The route is something like this: community/151

Then I have 'community/151/videos/897' when a the video node 897 is associated to the community group with a nid of 151. The question is what is a group for OGUR? Just the frontpage of the group? all the route till the video node?

I'm asking this because If I print_r($user) I can see the roles OGUR is assigning to the user on the frontpage of the group, but if I go to community/151/videos (this is a view) or community/151/videos/897 OGUR stops assigning the role to the user.

Or maybe I'm doing something wrong here. I'm using this routes and aliases so the breadcrumb works how it is supposed to work. Thanks