That is how you recognize someone who's never played that game in their life.
First of all, all characters of a given race start in the same place. This guy playing an elf (light elf) is bound to start in elven village. This is why the all the characters are more or less the same looking at the start. Later you meet with other races, or you could walk or teleport there but your starting quests (tutorials) aren't there. Second of all, in all the classic L2 (10 years or so) you could choose between 6 races, then choose warrior (later archers, tanks etc) or mage (later wizard, healer, support buff), then male or female, then you had exactly 3 haircut options for each with a bit of face change. There was no color option or anything like that and nobody complained for many years.
Character customization wasn't part of the classic L2 but different gear, that looked amazing imo, was enough. In the classic you can start the game looking like a peasant and then through gear to look like more or less like this. Gear itself, hair accessories from quests, or hats from bosses, is what made characters looking different. Gear itself was different looking from race to race or from a mage to a warrior. Everyone could start looking pretty much the same than change a lot or make combinations. This one is a human male warrior, a tank class, and this one, a human male warrior but an archer class. This one is a female dark elf but a leather class. This one is the same race but a wizard class. You could make combinations. This one is a female warrior type, in a robe armor, with a dragon weapon greatsword.
After the game went f2p they added a game boutique where you could choose more hairstyles and a bit more colors, but still very much away from being customizable. It's not the game for that.
The comments reflect the fact that they don't know what they are looking at and they never played. This guy playing chose a mage elf and he is fighting like a warrior. I couldn't even stand looking (scrolling) at more than half the video to see this guy never played L2 in his life. He is playing like those who started in 2003-2004, not knowing how to learn skills, going melee as a mage, never hearing of soulshots (50% more damage). If anything, this video makes me a bit angry at the guy for not knowing how to play. Of course, the game being in KR language doesn't help either. You need a tutorial for this game if you never know.
But I'm impressed with what they have done with the game. They kept the races, the starting villages have pretty much the same elements like the old one, they kept the art, they kept the mobs appearances, the zones, the sounds, but overall improved by this new engine. I won't play it because it's a mobile and I don't waste my time with these games but from my point of view, I see the game is reminding me of those past years. It was a very grindy game, where you could waste many many hours in a day with a group in the same spot trying to earn 5% xp, or waste half a day trying to kill dragons, taking hours to kill raid bosses. If they kept the old feeling, this game is for sure not for everyone that is new to the game.
By the way, watching KR streams, some with thousands of viewers, it seems there is some character customization that you can unlock.