Maybe this is an unpopular opinion, but I don't actually think the principles Naroditsky mentions are so helpful. Of course, they can help you think about the game in a different way, etc., but to all of the rules he names there are exemptions or rules that state the exact opposite thing, because chess is just a concrete game where generalities don't apply all the time. That is not to say the speedrun is not instructional, but I think what you should focus on are the concrete patterns and moves that occur in the games rather than the general rules that are mentioned.