Just a follow up here, @patrickelectric was able to control my ROV on the US east coast from his desk in Brazil according to the points I outlined above. We did have to play with the video stream settings to get latency to a good point (it is drastically better when the resolution is lower), but in all, I’m quite pleased with the initial results. We were going through our home internet and wifi, I’m not sure how well it would work on a cellular network, probably not so well.
Will do a stronger writeup when time provides.