I have no idea if it's the best (or even a good) tool. Other commenters suggest some other tools (for both text summaries and condensed video summaries - a sort of 'highlights reel'):
It's not really giving summaries but gives topic/section timestamps and highlights what was discussed.
(Main focus is actually making mini-courses off of YouTube videos but I found the section summaries really useful for figuring out which parts to watch)
I have no idea if it's the best (or even a good) tool. Other commenters suggest some other tools (for both text summaries and condensed video summaries - a sort of 'highlights reel'):
https://news.ycombinator.com/item?id=39435930
https://news.ycombinator.com/item?id=39435964