Streaming Video

Does any one out there have any recommendations on how to stream real time video to several different phones or tablets? We have just launched a drone program and one of our tasks will be field support and we would like to be able to stream from the controller phone/tablet to people in the field who will then be able to tell the pilot what and where they need to see. All this of course done securely. Any help will be appreciated, we have thrown around ideas like a Zoom type conference or something like that