They are to be true to the movement shown in the video yes. Movement is a strong focus for the dev team. It's likely gonna be better than what is in the video even, as what is seen in the video is very early pre-alpha footage, which is already now more than a year old.

Take a look at this blog post, and check out how awesome another type of movement - jousting - looks :D https://chroniclesofelyria.com/blog/21445/Production-Journal-Going-Full-Tilt

Even though this is an old thread, I loved that they did the fight scene from the Princess Bride too :)