Couple of scenes that were released:
Rand and Logain:
View: https://www.youtube.com/watch?v=cosCCaBux-U
Nynaeve Accepted test:
View: https://www.facebook.com/TheWheelOfTimeOfficial/videos/1348579479118148
(I hope they release it on youtube)
Yes, it is her, since some people found out this actress will play her
I have many thoughts and most of them are negative sadly. I want to see the actual episodes to judge more thoroughly