And also in an MMA context versus a weak kicker...if you're a strong kicker in an MT rules type ruleset (or even MMA ruleset), what would prevent some guy from just cut kicking the leg out from underneath you with a hard kick? Dude in the gif was planted...in the technique shown in the OP, he'd be hopping in the air possibly when the kick lands on his back leg (making him easier to sweep/off balance).
Furthermore, the checking technique shown at 0:24 is poor form...with a kick that low, you can just pivot your lead leg outside and still check the kick. By raising his leg to check, he's actually taking the kick at the weakest point on his shin (right above the ankle).
You should be checking with the thick part right below the knee and impacting the kicker's foot/ankle/lower shin for maximum damage/pain.
Not that I train MMA, but it seems like it would just be easier to step back with the lead leg to make him miss and then just rush in and take him down off a missed kick.
Imagine the leg pullback here, but then rushing in for a TD instead: