I only watched half the first match but if he plays that way regularly I do have some advice. First off he rolls too often, falco will shoot you in the face after you roll and alot of times that means he will get inside tipper range and a good falco is really hard to grab, so try not to roll unless you really need to dodge a dair and get into a good possition, wavedashing is usually a better option if you have time. In the air against falco try to hit them off the edge, not upwards, you cant really combo and at high percents you need them off the edge, because after 80% you can only kill them with the third hit of your sword dance, forward tilt to edgeguard or, neut B, and of course your smashing, but that is really hard to hit with out of no where, sweet spotted bair works wonders too at 80% after an up throw, only if they DI behind you though, if you try to jump into it, it wont work, just try and jump and fair otherwise, the key is to edgeguard. They are no more dead if you spike them than a forward smash, so after your counter of his firebird you can just edgehog if the went too low, or you can forward smash if they go started it too early, they can only sweet spot from a certain distance, once you know that distance just wavedash onto the ledge before they grab it, this only work for the up-b cause its slower, if they forward b you have to be able to predict it to do anything. You seem to have the basics of the grab combo going, but remember it really isnt for racking up that much damage, its more for the forward smash and up tilts at the end. Learn to anticipate your friends DI and smash him, you can wait a second before grabbing to see where he is going to go, calm down and play a little slower. Finally stop jumping away from him when you are in perfect range. Instead of retreated just put a well aimed poke, or run through him when he doesnt expect it and turn around and grab him, you should grab what seems like a lot, but really isn't when you grab it should be unexpected and you should get an edgeguard or a kill out of almost every grab you do, sometimes its hard. Well thats all the advice I have for you, against falco spike less smash more. GL.
(and sorry about the quality)