Yes .
I have done that with multiple cameras in couple of venues.
Just sent composite from several cameras placed around a stage up the audio snake to the
control booth and switched the show from there.
The run was about 100 feet from each camera.
I did not have any “s-video” adapters that would go from S to XLR, so I just used composite,
but I imagine sending S via the two conductors in the balanced cable would have worked, too.
Necessity is a mother!
😉