Why hasn't anyone 게시됨 the two sneak peeks from comic con?

I wanna see the two short clips from the upcoming season 4 premiere where one shows Regina seeking help from Sydny and the other shows Elsa and Anna but no one has 게시됨 them online yet. I mean why should the people who were lucky enough to go to comic con be the only ones to have the pleasure to see them? If it's a copyright thing then why have they shown sneak peeks for upcoming episodes online before?