I did some looking and in just a few minutes I discovered what appears to be some prior art if anyone is interested. Apparently the first video conferencing was in 1968.
http://homepages.uel.ac.uk/S.L.Pogod.../timeline.html
This would put to rest any claims that Acacia "invented" anything in 1991 I guess.
Maybe it's helpful, maybe it's not, but there it is if you need it.