Ethan, I also observed the vibrating labellum, that you saw on another plant not far from here, and took a short video:
https://youtu.be/zIIj5oqctDg
It vibrates on calm days, too.
On windblown rimu, cleared from track. Plus, a couple of photos were taken on 12th June 2023.
Epiphyte growing on trunk of Xylocarpus moluccensis in mangrove forest. Approx 10cm diameter. Leaf length 5cm.