No wonder it looks terrible when it's just some website who decided to mess around with the settings for a video file to make it look like it was running at 48 fps.
This. That doesn't look right. I bet the actual movie will be alot smoother. The motion in the trailer is stuttery, and everything seems to move faster rather than smoother.
+1. you can't really produce more frames out of the original 24fps file. the only thing you can do is to speed things up, but there's still the double amount of information missing, which they can't reproduce in the "fake" trailer.