How to succeed in sports? practice, focus, take care of your diet and health
How to succeed in a large company? keep your boss happy, work hard, focus
etc
This is not Altman's fault. I don't think the videos can -- or are supposed to -- replace actual detailed daily advice on struggles which, presumably, you get if you join Ycombinator.
I don't think that "focusing on bringing stories of various startups to light" is all that different from what he is doing. The same criticism applies: it is their story not yours.
And the same caveat applies: it is a sample of the kind of advice you will get.