-0:19 - You used the Laser really close to Lucario, while you were both in the air and facing each other, at an angle it wouldn't hit the Lucario at. Generally, don't use your laser in any sort of close quarters with your opponent.
-0:22 - You just floated into his Fair with your Fair. Lucario's Fair beats your Fair. Don't do this.
-0:25 - You lasered in the wrong direction.
-0:28 - You lasered downwards while Lucario was above you. Had you angled it up, you would've hit.
-0:31 - Same thing. You keep angling it down when an up-angled laser would hit dead-on.
Something to keep in mind is that the Laser's recharge time is 2 seconds for minimal charge, and 20 seconds for maximum charge. You've used it (and missed) four times in 12 seconds, so basically one per 3 seconds. That ain't Falco, don't be spamming this.
-0:35 - Again with the down-angled laser, and again using it really, really often.
-0:36 - And here's why you don't laser so often. You tried to Laser at point-blank range and it didn't even fire because you used it one second earlier, then got hit in the face with Lucario's Fair. And got combo'd for 35%.
-0:44 - Random U-Smash. I don't think it even would've killed at this percent.
-0:47 - The first time you actually hit with the laser, lol. You aimed up that time.
-0:51 - See what aiming it up gets you? Free percent. :D
-1:06 - You could've Z-Caught the Gyro, instead you floated for a sec and tried to Fair and it fell too far. If you're gonna grab your gyro, do it, if you're not, don't look like you're going to.
-1:13 - Don't just challenge Lucario in the air like that. It's not a good idea in general.
-1:24 - Not sure what you were thinking that made F-Smash be a good idea against a Lucario on the edge with a fully-charged, 147% Aura Sphere. Just shield, or plant a gyro at the ledge to be safe. A Gyro of any charge will eat up an Aura Sphere if it's sitting on the ground.
-1:38 - You put yourself directly above Lucario in the air. Don't do this.
-2:07 - Again with using the Laser at point-blank.
-2:41 - Again aiming the laser down when your opponent is up.
-2:46 - You laser in the wrong direction.
-3:03 - Don't spot-dodge spam against Lucario, Dair goes right through spot-dodges.
-3:10 - That point-blank laser again. You got Baired before it even came out.
-3:15 - Don't Robocopter. Just don't.
-3:19 - Momentum cancel with Fair, not Bair.
-4:43 - You just sort of stood there while he started charging his Aura Sphere. On top of you.
-5:03 - Get used to powershielding Aura Spheres.
Will edit in a bit for match 2.
-0:27 - You just randomly started getting combo'd really hard here.
-0:50 - Yes, you hit with it, just try not to use it that much. He could've F-Smashed as easily as using Aura Sphere and just hit you hard.
-1:18 - Not really sure what that whole bunch of shenanigans was but it got you killed.
-2:19 - Don't U-Smash at such low percents. SH U-air would've worked better.
Didn't notice a whole lot else in this match that you didn't do in the other match, although you lasered less and aimed it better.
Overall, you need to work on your Laser play a lot, and know when you can and can't challenge Lucario, especially in the air. Your technicals seem pretty solid (except for lasers and the occasional Robocopter).