I can't really watch the video (I'm getting close to my usage limit), but I have asked why. I asked why to my supervisor. She said that Judith Butler needed a good editor and also, at the time of writing she was still working out a lot of her ideas for herself which always makes things less clear. Also, Butler writes about how the current linguistic structures we have in place kind of compromises descriptions of the human experience and so she's fighting against that. So, there are some good reasons for this kind of bullshit, although, as an undergrad, I can't imagine that I'd get a good mark for an essay that had a 94 word sentence (as well as several other sentences of similar length).