A fan made video of a dream scene the TV show omitted but is in the books.
One quick warning to those
who read the books or just watch the tv show, this video contains a massive speculative spoiler (despite the video taking place in the first book). It is speculative because the dream isn't conclusive, but fans feel they have figured out a major plot twist (yet to be confirmed in the books, but all but sure). Just watching the video may not give it away, as you have to think about it.
For those who read the book, it may still be a spoiler due to the nature of how some of us read, somethings the truth is missed in plain site. When a narrator reads the words, items we should have caught reading, maybe easier to see. This may ruin the plot twist for you if you didn't catch it and think about it when you were reading. This is, assuming all the fans are right.
Lastly, the video doesn't clearly say what plot twist they are revealing, and it is hard to say how obvious it is, already knowing what they are getting at, however the video description and youtube comments all clearly say the speculative plot twist.