Just a few things I want to mention:
The countdown is too much. A simply intro with your YT channel, or summoner name would be fine, but use the same style intro. The color and fadeaways were really cool.
The overall quality of the gameplay in the clips wasn't too impressive. Nothing really showing off some of the cool outplays you can do with Quinn (was expecting the Zyra kill when you died to kennen to be something like you vaulting off Kennen to ranged auto zyra then turning on Kennen). Don't be afraid to show clips from multiple games of her instead of just one. Some of the clips, in particular the one at :28 were excessively long.
The "gotcha" parts would be better in the really clutch kills that are super close.
And remember to show clips of you failing really hard. They are always funny to watch, and make it clear that you don't think too highly of yourself (Ex Gbay99) and helps to not come off as cocky about doing highlights.