Now there is a section that goes over the types of launches, but perhaps that should have been first in the presentation and go over what exactly is a launch and when do you do it?
Launches originate from the idea of a boat that's ready for sailing, and the first launch comes out of the dry dock. But even in that case, ships need many more months before their first sea trials (a different kind of launch), and then something else before ready for whatever their purpose is.
Like many other YCombinator videos, I think these assume much more understanding of terminology, lingo, and perception than the audience might actually have.
Also, I have a major problem with launching to "friends and family". In my experience, friends and family provide very poor advice and they're much more prone to be encouraging or want to provide emotional or moral support, without actually telling you if your business idea sucks. I burned years doing something that sucked, and when I stopped doing it, my friends and family told me they never thought it was a good idea. I asked them why they didn't stop me. And they said it would have been not nice to be completely honest. Ever since then, I've ignored friends and family and focus where it matters: on the customers who I want to buy stuff. I don't get why the recommendation for the 2nd launch after an MVP landing page is Friends and Family launch.