0:20 - Heads up. lol
0:22 - That nair wasn't spaced well at all. Make sure you get into the habit of overshooting all the time. He could have easily WDed back or DDed and grabbed you. He also could have CCed, so make sure you dair at low %s. Being able to potentially beat any CC is one of Falco's greatest strengths, so make sure you abuse it.
0:23 - You should have immediately chased him to the top plat to threaten his tech. In this case, he didn't even tech, so you could have knocked him right off for free damage and to push him away from the middle. Uairing like that is just too easily shield punished.
0:30 - Fsmash. Always look for opportunities to push Falco off, and fsmashing, even at sub-50%, will definitely do the trick. Alternatively, you could have tried something like SH reverse soft bair/soft nair to combo off of survival DI into an fsmash/dsmash/run off dair.
0:38 - Learn to LHDL. He was way too far to do anything, and it gives you a free pass off the ledge.
0:48 - There's that misspaced nair again. It looks like you are assuming he will run forward all the time.
1:15 - Be prepared for lasers so you can side-B right after the stun ends (which is almost immediately; you can do it fast enough that you can't even tell if you've lost height).
1:17 - Get used to side-Bing immediately after ledge techs. It will save you a lot of distress for when you make clutch techs and then get killed anyway.
1:18 - I highly recommend learning to ledge dash. It makes getting off the ledge 10x easier. In this particular instance, you could have easily ledgedashed and shined, grabbed, shine-grabbed, shined and initiated pressure, or whatever.
1:25 - I probably would have edgeguarded with a reverse ledge canceled dair so that I grab the ledge immediately afterwards. I don't think he was high enough of a % to tech anyways, but even if he did, you would already be in place on the ledge to cover all of his options.
2:00 - You aerial way too early on shield, and never FF.
2:09 - Laser OoS would have been perfect there since you empty hopped anyway.
2:39 - Could have utilted from underneath the plat.
That's probably enough to work on for a while. lol
General stuff:
- You don't laser nearly enough. ESPECIALLY when your opponent loves rolling. I predict and chase rolls with laser all the time because it's a quick and efficient way to pressure them without committing and giving up your space.
- You seem to have decent movement, but only in between stocks. lol Try and use some of that DD WDing in the actual match. If you have trouble figuring out when are good times to use them, just pick a situation and spam it until you get a feel for when it's most useful. For instance, any time they shield, instead of jumping on top of them, just DD and focus all of your attention on what they do OoS. Chances are they will do the same thing most of the time and you will be able to start punishing. For WDing, you could try WDing back every time you see them jump towards you, or force yourself to adjust your spacing with a WD before every attack. These obviously aren't ideal strategies, but they are simple exercises to help you develop your spacing.