Not even sure what to make of that. I can't really critique a video where you clearly were the better player. I can't critique your offensive choices if they worked. I could tell the Peach player how to get out of them, and you probably could tell that player as well, and maybe the increase in the Peach skill level can help you progress and learn new tactics.
But you don't want to run into tournament to find out some of your options aren't as good as you think they are. And I can't prove to you they aren't that good... if they worked in the video you provided. Make sense?
As for everyone else, videos like the one Kurei has provided are good to study in order to learn what Samus CAN do and what is POSSIBLE. Distinguish between possible and probable and you'll be better off when the opportunity comes mid-match where the opening to pull off crazy things occurs.
Kurei, if you are in Boston, why don't you go to DNA/Hall of Gaming? I'd like to see how you do in tournament.