im not the most knowledgeable but ill tell you what i think:
First video:
Your usage of toad. You're using it too much. If you use it once you use it too much really. Its easy to punish and not useful really in any way. All i have ever used it for is if i am high off stage as a means to float a smidgen with my momentum, nothing more. same with sideB, try to avoid them, they are heavily punished and not worth it even if you do connect with it.
Float canceling, i didnt see you do much, if any FCing. As peach FC is your bread and butter. If you dont do it, you wont win, or stand a chance really. Its essential for peach's gameplay.
Smash attacks. Fsmash for peach is very touchy. its not really good to use in most situations. dont get me wrong, it has its uses, but you used it too much in my opinion. Granted i dont face a lot of marios lol. plus it doesnt set up for too many combos.
ill watch the second video and post when i can lol. hope i helped in some way