Just finished watching it, I'd say that as for general Lucario gameplay, there is a lot you can add in, though, I like that you did with your nair follow-ups, and the down tilts into consecutive grabs. Though, it seems like rather than focusing on that the character has to offer, you just focus on your mechanics and reads. Which, while I think you could add stuff like I said that the character has available to him, your reads and general gameplay is pretty solid. Though, I also notice that a lot of the players you're against aren't really punishing you for mistakes made, and you seem unsure what to do at a couple of points in the video (particularly I noticed that during a grab, you were pummeling quite a bit, then stopped, completely pausing before throwing. Just figure while deciding you could potentially have continued pummeling.)
I really liked what you did on the smashville platform with the shield break, haven't considered trying it on that platform till now.
But, I feel like you should play a bit around a bit more with Lucario's tools. You're footstools and dairs were great, your reads on opponents moves (Fox/Pikachu side-b, forward smash using the momentum of boomerang) are very solid, but it feels you're utilizing mainly game mechanics rather than you're own toolbox to win, which don't get me wrong, that's actually a compliment, but if you meshed both together I think you could probably scare quite a bit of people.