Hello @jmp1514, You bring up a good question. There is a list of frequently asked questions on video appointments at Mayo Clinic but I didn't see the one you asked about out of state family members joining in. I did see the following note at the bottom of the page here - https://www.mayoclinichealthsystem.org/video-appointment-instructions/faqs:

Who should I contact if I have questions about my Patient Online Services account or preparing for my video appointment?
You may contact Mayo Clinic Customer Assistance at 1-877-858-0398, and select option 4. Staff are available weekdays from 7 a.m.—7 p.m. CT.

Have you tried calling your doctor or care team to ask your question?