As the developer is active on the HDR Wireless Live Streaming Plug-in Development, that is likely the best and most advanced solution. However, as there may be a cost associated with the backend video processing, you are likely going to weigh your options for technology and cost.
You can also run the RTSP plug-in from the robot to a nearby laptop with Wi-Fi and then use VLC on the laptop as a video source for OBS. Additional information on this technique is here.
You’re likely going to run into heat issues if you run any streaming plug-in for 24 hours at 4K unless you use a fan or attach heat sinks to the camera.