The Amelia Drone Project uses a lower framerate livePreview or motionJPEG. On the X, the preview resolution is lower than the V.
The max preview resolution of the X is {"width": 1024, "height": 512, "framerate": 30}
option 1: motionjpeg
easy to implement, but lower resolution and Wifi from camera likely not strong enough
If this is sufficient, then the Amelia Viewer could work to show the preview inside a browser inside the Quest 2.
option 2: live stream over USB
A potentially better solution would be to use either the X or Z1 connected to a small computer like a Jetson Nano or NUC with a USB cable, then transmit the stream from the small computer to the base station. The person would need to have a small backpack to hold the computer, battery and wifi transmitter (connected to computer)
option 3: use a plugin like the RTSP or HDR Wireless Live Stream (Z1 only)
The HDR Wireless Live Streaming plugin is under active development by @biviel . The RTSP streaming plugin is no longer under development.
Let me know which option sounds feasible and I can provide more technical information on the implementation. Also feel free to ask more questions about each approach.