I'll critique the first only, cuz im tired ;w;
1:00, he's got to end his b move to get back, you should've ran off with nair and ended that stock. Fire on the ledge isn't punishable and worth a try to scare him off.
1:13 run > shield > grab OoS/dashgrab. When someone's coming down from the air (especially kirby facing away from you) they'll almost always react, even if it's an airdodge. Having your shield up will save you often and get the kill. They can't grab you mid-air o3o
1:42 Although you worked up a good lead, keep in mind for future matches that a) you need to be aware of risk/reward factors when you're at high % and up a stock. Is this move good for this situation? I kirby shields/spaces it will I be save from getting punished? Do I really need anything other than fair right now?
Kirby's almost always going to float withing range trying to pressure you with bairs. your options?
If you notice kirby isn't spacing bair out of your range like he should (this one wasn't much) you can shield and go for a grab, which you did pretty well
If the kirby's timing is off on WHEN they let the back air out on you, then you can space it with fair.
Of course, you can pk fire his landing if he's just throwing out bairs out of your range (Idk why a lot of us just throw out moves for the fun of it when we're out of range)
2:50 GOT DAMN! I ain't even mad, that had me laughing xD I guess just try to expect it next time xD
3:50 MAH BOII <3 dat pk jump! you need to follow up with uair when you're right below him tho o3o happens often.
4:09. When you're in that situation, you've got to wait it out for the minute he releases and end up behind him away from the hitbox. Reverse fire, retreating bair....
(Diagram)
v platform (you)>>>>>>>
------------------------- v
v Kirby's hitbox v Kirby won't be here by the end of it
<----------( Kirby)
--------------------------------------------
Get the idea?
React quickly enough and you can even get a bat in there.
Get creative enough and you can have a platform slide rocket rdy for him when he's done.
In general, both you and the kirby should work on strings more. It'll help the both of you!