Thanks for your reply.
I kind of figured out some clue on Theta x. When I connect it to a charger and wirelessly stream to my rtmp server, streaming can last 9 mins with as low as 200ms latency. And then, it will get overheat, plugin will crash and need to be restarted, and latency will go up to 1-2 seconds.
If I put it under sun shine, I don’t know it will work for 3mins or less.
Theta X is my only theta now, I am wondering is any of the V or Z better than X on my case? Is it able to stream 360 video more than 1hour without crash on V or Z?