As an interaction designer I really liked watching this. I don't work for a startup but this is often how quick internal reviews go with a project team member at my company, as well; discovering unique scenarios you need to design for while talking through other issues.
And you're totally right, this isn't limited to startups. I didn't want to title it generally "what design actually looks like" because while I'm pretty arrogant, I'm not that self aggrandizing :)
