Live remote viewing implies broadcasting, and that raises the question of the intended audience, and of the expected fate of the rifle-operator.
To me, the situations that would "require" live viewing instead of a static file after the fact are one or more of the following:
1. The audience has a real-time tactical interest in the video.
2. The rifle-operator may not be able to provide a static file later (i.e., may be captured or killed.)
3. The rifle-operators or their organization wish to send a real-time message, whose impact would be reduced if it were displayed after the fact.
The only groups I can associate with the above situations are the military (1,2) and terrorists (2,3) with obvious differences in their respective objectives and rules of engagement. One can imagine many benign consumer-oriented situations that might use this technology, but none of them really require live-streaming.