It's obvious you're distracted by Skala's theme in the first game and Cascada in the second game.
If that's a mod then that mod is so ****ing awesome.
Actual gameplay stuff:
1. You play way too aerial vs Peach. She has better aerials than you. Stick to the ground and shffled aerials until she's above you, then spam uairs.
2. Too aggressive. Peach needs to be forced to approach, never feel the need to go towards her when you can just spam rangs and bombs to prevent her from pulling turnips. She has to come to you eventually, especially on FD, if you apply the proper pressure.
3. Waveland. A Peach who knows where you're going to land is going to absolutely wreck your ****. Doll was hitting you every single time you landed because he noticed you never wavelanded. This was a huge deal . Watch the video and count the number of times Doll commits to an attack before you've landed (not all of them hit, but each one could have been punished by wavelanding).
4. Play more like you did from 2:24-2:30. That is intelligent play, and while you still jumped a bit too high at times jumping is generally ok if you're tossing out projectiles. That fair you did high in the air was just begging to get punished, however.
5. It's Doll. That mother****er is pretttttty good.