100% agree, if I wanted to summarise videos I'd look for another extension that did that.

I was initially negative on the first iteration of this feature, but now I find I use it a lot on videos that are mostly "talking" with no need to really see the visuals. It allows me to speed through 10min-20min videos, and just get the important concepts. It now works better than it did at the outset. You may find your mind changed on this one, if you start to use it on select videos.