Pull back.
If they're still moving backwards, I can then step in. If they change and come toward me, I can then step back to maintain range. If they go to the side, I can match them. If they just stop, I can get another kick of some sort.
In the video you showed, he's off balance at the point of presumed impact, the only way he's going is forward. If his opponent dodged back from his kick and then came back at him, he's effectively falling directly into their counter attack. I've had that happen to me when I started with sparring, and I've taken advantage of that myself plenty of times too.
Some things are worth that level of commitment such that you only have one possible trajectory, but imo a front kick is far too low value to reduce my options to that extent.
That really should address what
@jobo said too, but I'd be surprised if further argument didn't follow