Guides
From download to your engine
Every animation is generated on your character’s own skeleton and exported with your bone names, so importing it is the ordinary import for that engine - these pages cover the two or three settings that matter.
Unreal Engine 5
Import the FBX onto your character's existing skeleton - no IK Rig retargeting needed, because the animation was made on your bones.
Unity
Humanoid or Generic rig, root motion settings, and looping.
Blender
Bring the clip back onto the same rig, or use the BVH on anything.
three.js, Godot and the web
The GLB is a standard glTF: load it, play the clip, done.