The segment is from a show about interesting trivia or rumors about famous people, and it starts off by saying that there's a rumor that Shiro Suzuki, the retired announcer, is an expert at "Biohazard" (they don't seem to specify the game as being Biohazard 4).
Actually, the commentator doesn't go on much about his age, they briefly explain what the game "Biohazard" is, and cut to a shot of him saying in that he doesn't consider himself a master or anything, but that he gets bored playing normal and he has to clear the game on Professional and that he can usually clear over 90,000 points in the Mercenaries.
They then explain how to play "the Mercenaries", and then let him strut his stuff. There's a couple of funny quotes where he says something like "You've got to throw a napalm grenade and let them all burn" and the hosts (professional comedians) laugh at the irony of Suzuki explaining how to burn zombies.
Suzuki also says stuff like "shit", "eat this", and "asshole", which also gets a few more laughs.
