If a book can be summarized in 10-15 minutes and the rest of the book was worthless "filler", I wonder whether or not that's the sort of book worth summarizing in the first place.
Book summaries will tell you what the concept is, but not why it works or how they defend it.
The book Outliers has some very bold concepts - the 10,000 hour rule, as well as justifying that underdogs are usually the winners. These are easy to claim, hard to defend, and you have to read the book to understand it.