Based off of the trick styles, the music, the stature and the movements...Hong Boots is about the best guess
I’d say Jarod, you can tell by the off-hand. Boots has a signature claw that he does most the time, while Jarod’s is usually just in a relaxed position.
Nahhhh no ONE person is slayer x. slayer x is just an identity. I can see hongboots being one of the players (maybeee jarrod), at least two or three different play styles in the video.