What do you mean with saying "so high"? Do not forget, that Vimeo is converting the video again after uploading a h264 file.
Basically, there is no black in your video. It is leveled up quite a lot. It is grey. So you wasting the dynamic range. What is the purpose of doing that?
This is how the movies looks like:

And this is how your sample looks like:

So what's the purpuse (artistic or technical) for such a flat grading?