In the comments of the original video, someone translated his words. Sebastian told them he was going to mention Civil War in the midst of his Romanian just to mess with the audience. So no, he actually didn't spoil anything from the film.
Hi, my name is Sebastian, my friends call me Seb or Sebby. I speak three languages and I'm easily distracted. I have nothing better to do so I'm here. :) and I belong to this beautiful girl right here who just pinned this picture