There may be some good uses for video conferencing in the church, however there are some technical drawbacks.
Few people have the camera, the matching software, and the speed it takes to make it work.
The video is slow and I haven't tried the audio, but I have enjoyed visiting with my parents and sister and her family a thousand miles away. Internet Phones have great potential for long distance communication. It takes some speed to get adequate audio. It saves money to call long distance, but the quality is often like using a can and a string at both ends unless you have a connection better than 28.8.