That's bunny hopping, a common glitch in video games, but I think that it's not a major glitch, so the category would still be No Major Glitches.
It is glitchless "technically" because it's not mentioned in the rules, though it could be a topic for discussion (I'm uncertain whether it's worth it, maybe it is so that it's at least indicated in the rules whether it's allowed or not), since it's a collision detection glitch/limitation (common in many(?) video games with 3D collission), which causes the colliding player/object to accelerate in a direction in certain conditions. The trick might have the potential to be very game breaking by skipping a lot of content if effectively exploited, so it could be considered to be a major glitch or shortcut.
I also used it at the end (2:59) of this run in a different VRChat world:
My mistake, I assumed that it was a VR headset related to PICO 4. I removed it now.
