video 1:
What was with Falcon. Seriously, were you playing around with this guy, or did he just pick up falcon?
video 2:
Why don't you use the f-tilt... at all? On mario, it is almost the "I win button." It's fast, bit of priority, and is a pretty ranged attack. I would say that if you start using that and watch your spacing, you'll do fine in this match from now on.
video 3:
Edgegaurding for you seemed completely absent here. All you did was drop bombs on the edge and waited for him to come back. There were plenty of cases where, had you been edge hogging, he would have died. Other times you could have capitalized on him not sweet spotting (eventhough he did do it very well in that match) with an uptilt or someting. Just try some different things out when edgegaurding.
video 4:
When Mario is off the edge, try going out to him more an Nair-ing or something. If he gets hit at all, it usually means it is over for him. The nair wil also stop his Up B in most cases. Try that.
video 5:
Screw out of shield is amazing, and I haven't seen you use it yet. This mario is completely in your face, and he doesn't grab at all. The thing I would suggest is to put up your shield on his approach and then up B him into something, or just to get him off of you for a sec.
In general, you've got potential. That Mario was good, but what was with the captain falcon? His Falcon was horrible. You need to get a better edgegaurd and a mix up in your recovery. I don't think there was a time when you came back to the stage without using the grapple! Another thing I want to point out is that you over use certain attacks and completely leave out others. Try some new things and you may find you like them!