I don't think there are any notable vidoes of Lucario out yet - in fact I don't even know if there are any top level Lucario players at all right now. From playing as him as well as against him I can assure you though that Lucario is really stupid in this game.
Aura really does make him that much better. The aura effect itself has been increased and with rage being a thing in this game Lucario can start killing opponents around 80% with Force Palm [80% on both, myself and the opponent, was just about the lowest % I could land a kill with that move]. His other KO moves are all pretty safe on shield and he has powerful edgeguarding tools too. In a game where it seems that a lot of the characters struggle to get their KOs Lucario is the one character that kills opponents earlier than you'd expect. Imagine playing Trela's Lucario in Brawl with higher KO power and that you can no longer gimp. His counter has also been dramatically powered up.
Gameplay-wise, Lucario has good footsies and a strong mid-range zoning game. His jab, grab, utilt and dtilt are the prefered grounded close-range options, mixed up with fair and defensive moves [his rolls are still very good]. For mid range zoning game Fsmash, ftilt, bair and aura sphere are all good, disjointed moves that are hard to punish allowing Lucario to safely pressure his opponents from mid-range. Pivot ftilt and fsmash are fantastic options and are good tools to ledge trap opponents. I honestly don't think that Lucario is that hard a character to play because he has been largely left the same as in Brawl except better in almost every way. Even his "gimmicks" such as reverse neutralB to escape juggle traps still work. The only move that I can tell to have been nerfed is his Aura Sphere. Its KO power seems to have decreased whereas the cooldown lag has been increased but that only means that you have to use that move a bit less than you would've done in Brawl.