FPV antenna, and it's not really a VR headset, just a monitor in some goggles that receives the video transmission from the drone. Hobbyists that do racing and aerobatics have setups like this. It's big and flat because it's designed to be highly directional to cover the most distance. The video runs over 5.8Ghz, and the control signal over 2.4Ghz.
Edit: found it on Amazon https://www.amazon.com/Soaying-Triple-Antenna-5-8GHz-Pagoda/dp/B0CWG8DKJT
It's self-selecting. In order to be here in the first place, you have to give a shit enough to ignore the big corporate social media sites in favor of finding and using this one.