This kick is quite good. But not perfect yet.

His kick is good in the following points: 1> He doesn't move his forefoot before kick, or moves less. 2> his pose is correct, 3> He doesn't jump up slightly when he kicks. I mean he stays in the same hight. 4> He drops foot as soon as he finishes.

He wiil be better if he try to reduce time gap between sign of kick and actual kick, and he keep in lower pose all the way.

Remember, "As it is the obedient following the world to lower your pose in humble way, if in this right pose, you can preserve yourself even if you do nothing. Since you follow the principles of the Nature, all creatures come to help you."(3JKY, Ch.3-2)