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Everything in this trailer wont be in the show. It's no different than boxers doing a promo video before the fight where they are standing on a set. <iframe width="560" height="315" src="https://www.youtube.com/embed/TizLjqv6OUw" frameborder="0" allowfullscreen></iframe>
Nothing that will actually be seen in the episodes is shown here. Just promo close-ups of John Snow, Daenerys & Cersei.
I watched first three episodes and couldn't go any further: 1 - because of the thought of how many seasons I'd have to watch of... 2 - ...swords n sorcery, demons, tits & dragons - of which I only like tits.
The series has more human drama, political schemes and machinations AND tits than it has sorcery, demons or dragons.
Okay then. I commend you on giving it a shot and by starting at the beginning too. You won't believe how many people I know who gave it a try in the middle of some random season and couldn't get into it. Seeing as how you didn't enjoy it three episodes into season 1 I'd say don't waste your time any further. It's obviously not for everyone.