Chogyal Namkhai Norbu - Dzogchen Teacher gives many teachings via webcast:http://www.dzogchencommunityuk.org/acti ... hings.html
His Holiness the Dalai Lama gives many talks on compassion and various buddhist teachings:http://www.dalailama.com/teachings/schedule
Both are excellent teachers able to connect with students via webcasts. There is no need for text/video chat but it is a very real interaction if you are receptive and open to that way of teaching. May be difficult to tune into that in the beginning though so it helps to make in person contact with the teachers and other students when you can.