https://www.youtube.com/watch?v=cSqi-8kAMmM
Kind of interesting that it focuses a lot of Yennifer's backstory. Also seems to hint we'll see an adaptation of the original Witcher story which features the Striga, and which has been recounted a few times in the games (It's the intro cutscene for the first game) and the comics (In Curse of Crows).