Good vid. The technical breakdown done in slo motion by the coach @ 4:25.
His posture is still balanced/forward/solid and taking deliberate and measured half steps. Fedor's was similar in concept but he was clearly leaning backwards while throwing the counterpunch (not the greatest idea in boxing) with little-to-no technical emphasis on (to make up for) foot placement. Fedor, of course, he can afford to go to the ground, probably all the better for him because sambo guys like Fedor and Kabib tend to do that backwards twisting suplex where they land on top, they love to do that and they're very good at it.
The difference between the vids is small enough to miss, yet enormous. If you used each example to learn from/to train one group of striking students, the difference in results between the classes would not be fair. Which brings me back to not recommending Fedor's video to learn from unless maybe you're competing MMA with a Sambo background, and probably even then the vid you posted is still much smarter to learn from. Fedor knew what he was doing, but a lot of what he did was tailored to himself.