@Bandit-Sailor That doesn't appear to be god mode because he flinched when damaged. True god mode means you don't take damage from any source at all meaning you don't flinch when hit either.
Like Dss0 said he may have access to commands or privileges on the server that can give him such an advantage like increased health etc.
Whats ironic is you are complaining about "cheating" on a server where the video shows you on round 8 but you have almost a million points, and all perks.