The characters are from gta so that how they are going to look like so use your imagination to picture them. But only their clothes are for gta. As themselves in real life expect delirious who we don't know. Sorry because I got no time to descried them physical.
The description below is a rough thoughts so it may or may not follow it.

Youtuber:

Vanoss: Leader of the gang,mastermind
He the one that plan everything and watch everyone
H2Odelirious: right hand man of Lucifer, craziest person
Wildcat: right hand man of Vanoss, the tank bring the fight power and strength
Miniladd: Doctor
Take care of everyone medical and surgeon
Lui: weapon expert know everything about gun and best aims
Nogla: agent is expendable which mean he can be replace and he gather information for the street, undercover
Moo: hack, information best person to come with information and tracking
Terrorists: mechanic know everything about vehicle, planes, tank, ship and any to do with any that move with metal and fixed
Ibasicallydowork: thief steal stuff and fighter

Other character:

Lucifer: rival gang leader
Damon: right hand man of Lucifer
Inventor: ?