If you just can't get enough info about Lost Ark, you'll definitely want to check out this new video from YouTuber B Banishing. It features a compilation of Berserker kills. You can check out over eight minutes of dominance in the arena.
About the Berserker via the Lost Ark Gamepedia site:
The Berserker is a warrior that wields a huge two-handed sword in battle. He is able to enter a frenzied state, and while in it can crush any enemy with his strength.