Playing on full screen is actually better, the game renders more easily or something. Resizing the screen can make the game lag, but as long as you use CTRL-F to full screen it is actually less resource-intensive.

Here is my short guide to falcon (doesn't necessarily apply to you, these are general Falcon things):
_Nair. Nair has high priority and low lag and a lot of hitstun, and it can be used to perform nair string. My favourite version of these is where you do repeated SHFF nairs, and you always get the second hit of the nair behind you, sending them back. Because you landed quickly, you have enough time to run and do another nair that sends them behind you. Rinse and repeat.
_Grab->dthrow/uthrow->knee or uair or nair or grab again, all depending on MU/KB/DI
_Uair is amazing. After nair, it is probably falcon's best move. I often find myself using this move more than knee because it is more versatile and just safer overall. It comes out super fast right at the front, learning to control the timing during a short hop can give many different followups (for example, an opponent lying on the ground can be hit by doing the latest possible uair during a short hop).
_His smashes are pretty useless lol
_His specials are, for the most part, pretty useless
_His tilts other than dtilt are pretty useless. They aren't the kind of moves you want to be throwing out in neutral. They are def more useful than his smashes though.
_Uair/Stomp->knee. These are the classic Falcon combos, and you need to be able to pull them off. Uair->knee is harder to do in this demo for many reasons, but it is still perfectly possible.

If I was to do a tier list for Falcon's moves, it would be...
S-Tier:

Blue Falcon, Nair, Uair, Dthrow

A-Tier:

Fair, Dair, Upthrow, Bair, Jab

B-Tier:

Dtilt, Fthrow, Ftilt, D-spec, S-spec, Utilt

C-tier:

Dash Attack, Getup attack, N-spec

D-Tier:

Fsmash, U-spec, Dsmash, Usmash

K-Tier:

Bthrow, Pummel, Ledge Attack, Jab2, Jab3, Jab3 loop

Jammy, the others critiqued you well, so I'll only add one thing: dash dance during the match, not just after a kill like 90% of people do online.

I'm trying to work on that, thanks

You're already doing better. GGs.

With that logic, dtilt shouldn't be such a high tier cause it can't be spammed in neutral and only has one use (setting up knees). I think that the whole idea of a 'tier list' for moves is flawed anyway: you shouldn't be placing a move lower simply because it can't be spammed in neutral. That's not the purpose of the knee, it's for finishing. And as a finishing move, it should be high tier. As a setup move, dthrow is high tier. As an edgeguarding move, bair and utilt are high tier. There are many ways to class a move as 'good' and a straight up tier list doesn't justify it. Just my opinion.

[ https://www.youtube.com/watch?v=1UxpZfAqyns ]
There wasn't a good combo video for 9b yet, so i decided to make one myself!

I'll definately make more in the future, but enjoy this one!

[ https://www.youtube.com/watch?v=1UxpZfAqyns ]
There wasn't a good combo video for 9b yet, so i decided to make one myself!

I'll definately make more in the future, but enjoy this one!

Nice vid!

But do you mean there were no good ones for 9b in general or just 9b falcon? Because Zalo and I made pretty good ones.

I am not that kirby.