In Theorem A.6 of Dugger's paper, it is shown that a few localizations are equivalent to the localization of Čech covers.
The Nisnevich localization at all hypercovers is equivalent to the localization at Čech covers. But the etale localization doesn't have this property. A related post here gives some insights about "hypercompletion" from $\infty$-category point of view.
To show that Zariski or Nisnevich hyperdescent is the same as their Čech descent, one either uses the results of Brown-Bersten and Voevodsky or shows they have finite homotopy dimension in the higher topos setting.
When I first read about hypercovers, I thought people showed that Čech localization is the same as localization of all hypercovers under some conditions and then went on to reduce Čech decent condition to some simpler excision conditions for some topologies. Is there a way to show that the two localizations are the same for Nisnevich or Zariski from the properties listed above?