I was actually gonna comment on the fact your most recent videos are literally the exact same as leafys, titles and everything but someone else got there first, but anyway thats not important, speaking from someone who has been badly bullied and mocked in the past i can tell you this, it WILL end, i don't know how long you have got left of school but you will one day be away from them and this won't last forever
However these are not your friends so please stop referring to them as such, i know how hard ignoring bullying is as it hurts so much and can really impact your life, but it sounds like you DO have friends who support you, so stick with them and keep uploading and trust me if you ever got big they would suddenly want to be your friend and you can tell them where to go.
Often people seek revenge like they may film the bullies and expose them on the internet for example, or just beat the living s*** out of them, i propose you do neither, i personally always came across as weak which the bullies loved, prove to them you are stronger then them for example witty comebacks, or one that i personally adored that was in the program my mad fat diary, whenever they came out with a catty comment the main character just looked at them said "aww" gave them a hug and said something quite patronising about a certain insecurity they may have i think she said something about all the makeup she has to wear to cover her acne or something i'm not sure, and that they feel sorry for them. It was hilarious because it did shut them up, basically just think of ways you can shut them down without physically hurting them as it really isnt worth it, but whatever happens one day it will stop