How to do a kneebar from top half-guard

Here is how to do a kneebar from top half-guard demonstrated by Žarko Vasiljević, a Serbian BJJ black belt, a Serbian grappling champion and an owner of Zarlock BJJ Academy in Belgrade, Serbia.

Žarko’s academy and youtube channel:
http://BJJZarlock.rs
https://www.youtube.com/channel/UCsE9DN84OoBsiBbeZZ_TIBg