NO different than how I teach my students to kick low...even regular kicks are done that way...
There comes a point in time when you become comfortable with techniques to adapt them to your particular style, the way your body moves. This is the point when you no longer need to abide word for word with what your instructor taught you about the technique, your now making it your own.
Some people never think outside the box, they don't listen to their bodies when it tells you something feels ackward or something isn't right. These are the students who will attempt to execute a low round kick as if you were kicking the solar plexus or face.
It is natural that when you kick low, you no longer chamber upwards, however thee is still a chamber, instead of lifting the knee upwards you simply bend the knee back. This is something you discover on your own, unless your still a beginner. A MT, kick boxing and WTF TKD kick is all the same. The only difference is the striking tool, in TKD I have yet to find a reference to shin kicks.
The only time you get kick boxers that do not kick their round houses like TKD is when they come from a different martial arts background, for instance the Chong hon style has that wide trajectory kick (similar to a bat swing), which often is used by grappler's in NHB. However check out MT, kick boxers and they kick round kicks just like WTF TKD.
That video proved nothing...
Kick through your target...
Turn your entire body...
Kick with your whole body...
This is something everyone in TKD does, if not then your doing it wrong. The only difference between thai kicks and TKD is the use of the shin.
And one more time, truthfully if your a TKD student and your adept level which is around black belt, then you should basically be able to know you must adjust your kick in order to kick low, it's like the higher you kick the more you telegraph, because the target is further away, it's as basic as understanding that you must pivot your feet when you rotate your hip.
