Resistance to using Audio and Video
You have raised a good point. As I cannot speak for the community, I am responding with my personal view. In my personal opinion, this can only be done by leading by example. It is often the fear of technology, the extra effort, the lack of facility that can handle these things, but I have seen it many times, once somebody takes the initiative and it works, others will want to follow.
I appreciate your personal response. I wish my colleagues were here to read it.