Ugh personally the #1 thing that I hated about this video was the red sound bars you used. It takes away from the plays made and is very distracting,and I honestly don't feel it's visually appealing at all to begin with. Also the part with the countdown was off and I think you could've made the song go in sync with your combo kind like how a lot of montages have like at 2:50 you could've timed it better so that the countdown wasn't off + that moment when the beat intensifies you E onto the enemy Nocturne or something to make it more "epic".
Minor things that personally both me are I don't like how in the clips that the top/bottom is cut off and I don't really like the fonts used. Also the introduction should've only included the champions you were going to play in the clip and the "SKINS GIVE POWER" was irrelevant to the video (and you don't even have a Talon skin baka!). Lastly even though Lee Sin/Irelia are considered assassins,I more of consider them as bruisers than assassins just because of their build paths and general play-styles I find are way different than an assassin.
I play champions that I can relate too in terms of personality,lore, and of course play-style. Sometimes just one of the other like one example I use often is Rumble, he's a champion who reminds me very much of when I was a kid when I had daydreams of being a badass superhero in a mechasuit and I swear on my life one of them was me being a superhero who made awesome weapons from scraps I found in a junkyard. Personality-wise he's really cocky similar to me and also very smart quick I don't want to be cocky but I consider myself smart and have engineering as a likely career choice. Play-style fits me as well because I love playing tanks/bruisers and mages which Rumble technically is,I love his all-in balls deep play-style and the fact he snowballs hard and can still do tons of damage even if behind makes him a very safe champion to pick.
That's to say I also like mages like Xerath and Viktor and tanks like Sion,my play-style really varies. Like I hate auto-based champs like Kayle and Irelia and I never do well with assassins.