just my opinions but:
Being a teacher on KGS myself I don't think I would ever use this if it happens to be implemented.
The things I want to teach are on the Go board. They have nothing to do with how I, or my room, look like
It might be fun for casual chat, but we have loads of other software already available for that.
Another thing is that I doubt there will be enough bandwidth available if people start using this more often.
As for eurogotv and the likes. this might be the only useful usage of this system as it's nice to see the players and taste the atmosphere of the tournament.
But I don't think that this justifies implementing it into KGS or the likes. It works fine as is.
That youtube video you linked to would be just as instructive without a video(cam) of the guy who is teaching.
Maybe even more, because you don't get distracted from the chess board by the movement of the guy on the video .