If you use email or a chat platform that has some sort of history, this rapidly reduces to sending a separate link to each person. No spreadsheet needed.
Yes, it is a pain. No, it's not more of a pain than managing user accounts for the video conference thingy. Also, the video conference thing could automate emailing/texting each participant a unique link. It could manage the invites and address books locally (e.g., via the phone's existing contact list).
If something like the windows phone social hub still existed, it could even send the links via gateways to any social network the phone was logged into. I miss that phone. So much wasted potential.
