A lot of content seems to be blocked on the Smart TV youtube Ap, All VEVO content and a lot of TV content, How ever if i put the TV into web browser mode i have no problems at all with blocked content anyone have any idea why the content is blocked through the ap.

It's the same with other apps (old iOS Youtube App for eg). It blocks all music content from VEVO

Partially rights, partially DRM, partially structuring advertising playout to share the revenue.