This part is the important one.
At exactly 6:14 (you should probably slow down the video since it's hard to see normally), when Nero has his sword back ready to clash with Fury and the sound of the sword being ready happens, you can actually see how Fury at this moment uses his dash. This can be seen by him exhuding those red particles when he does the dash, and the glowing eyes whenever he's going to do one.
Now, if we assume that Fury's dash truly is infinite/immeasurable, this would mean that Fury
should've been quicker than Nero and hit him directly since he was dashing and making his arm move. Yet this is not the case as Nero can move in-tandem with him and block his claw, clashing with the Fury.
I screenshotted the exact moment where this happen if anyone misses it, though it has bad quality because it goes so fast even with 0.25 speed it's hard to see. Nevertheless, you can see how Nero's sword is up and he's about to clash, and Fury is moving his left arm with glowy eyes and having the said particles from his dash around him. This means that Fury was using the dash while attacking Nero, yet Nero moved in-tandem as I've stated.