The provided Google Cardboard scenes are not quite identical and each has a set of extra dogs relative to the other scenes.
Tracing the line of sight of each of these extra dogs spells out strings which collectively form WWW.AHC.COM/MIT. This URL is unambiguously determined by the punctuation included by the extra dogs (full stops being formed by a dog looking down at the ground).
Visiting www.ahc.com/mit reveals a splash screen from AHC (one of our sponsors) explaining that the answer to this puzzle is RED CENT. AHC (and specifically their Head of Motion Graphic, Luc Clayton) provided all of the exquisite round artwork and animations for this year's Hunt.