  The "golden" channel, in which the newly-discovered Higgs boson decays to
four leptons by means of intermediate vector bosons, is important for
determining the properties of the Higgs boson and for searching for subtle new
physics effects. Different approaches exist for parametrizing the relevant
Higgs couplings in this channel; here we relate the use of pseudo-observables
to methods based on specifying the most general amplitude or Lagrangian terms
for the $HVV$ interactions. We also provide projections for sensitivity in this
channel in several novel scenarios, illustrating the use of pseudo-observables,
and analyze the role of kinematic distributions and (ratios of) rates in such
$H\to4\ell$ studies.
