Long distance, low light
People need to define the priorities, if the video footage is important to assign a good place to the camera. A television studio with a live audience is a good example of the priority.

Of course, this is not the case, but I am pretty sure these days is not the opposite to that. It has some importance to be streamed, "Youtoubed" or something. So, talk to the organizers and define a good place.

On the case, you really, really can not be closed or in a better spot, Define if the lens is long enough for the case. Define if the camera shake at that distance, moving the camera to follow the presenter is good enough, define if that shake can be compensated filming on 4K and cropping to stabilize.