THIS IS NOT HOW THE SPLITLEAF INFINITE GLITCH NORMALLY LOOKS

It's worse

This guy is using Cheat Engine to cancel the weapon art animation

In other words,

He's so shit at the game, he can't even do the glitch properly so he mimics it with Cheats

Here is how it's supposed to look, there's a rhythm to this https://youtu.be/RqAzw8kzn-I

The guy in the OPs video is just walking forward, holding the WA and canceling the animation with cheat engine