Hi Rakesh,I tried that link but I got "Video unavailable, this video is private."
There may be a technical reason, or perhaps Ma wants it to be a once-only, real-time event.
I apologize for not putting the announcement up here sooner. I knew about the performance a few days ahead of time, but did not think of posting it to GSC until a few minutes before curtain time. If I hear in the future of something else of possibly similar interest, I will make a more timely post.