Ask HN: Create text and still image slideshow from YouTube video

This falls under the category of "Surely someone has done this?"

I absolutely loathe watching video tutorials. YouTube has automatic speech to text captions and extracting these is fairly easy.

But they lack context. It occurred to me that you could also extract significant video frames (i.e. a camera cut) and combine these with the captions to get a fairly serviceable image and text version of many coding tutorials.

Does this already exist?